ORDER
The opinion filed December 11, 2009 is amended, and the amended opinion is filed concurrently with this Order.
The panel has voted to deny the petition for rehearing and rehearing en banc.
A judge requested a vote on whether to rehear the matter en banc, and the matter failed to receive a majority of the votes of *1152 the nonrecused active judges in favor of en banc consideration. Fed. R.App. P. 35.
Appellees’ petition for rehearing and rehearing en banc, filed December 24, 2009, is DENIED.
No further petitions for rehearing will be permitted.
IT IS SO ORDERED.
OPINION
Proposition 8 amended the California Constitution to provide that only marriage between a man and a woman is valid or recognized in California. Two same-sex couples filed this action in the district court alleging that Proposition 8 violates the Due Process and Equal Protection Clauses of the Fourteenth Amendment. The official proponents of Proposition 8 (“Proponents”) intervened to defend the suit. Plaintiffs served a request for production of documents on Proponents, seeking, among other things, production of Proponents’ internal campaign communications relating to campaign strategy and advertising. Proponents objected to disclosure of the documents as barred by the First Amendment. In two orders, the district court rejected Proponents’ claim of First Amendment privilege. Proponents appealed both orders and, in the alternative, petitioned for a writ of mandamus directing the district court to grant a protective order. We granted Proponents’ motion for stay pending appeal.
We hold that the exceptional circumstances presented by this case warrant issuance of a writ of mandamus. The freedom to associate with others for the common advancement of political beliefs and ideas lies at the heart of the First Amendment. Where, as here, discovery would have the practical effect of discouraging the exercise of First Amendment associational rights, the party seeking such discovery must demonstrate a need for the information sufficient to outweigh the impact on those rights. Plaintiffs have not on the existing record carried that burden in this case. We therefore grant Proponents’ petition and direct the district court to enter an appropriate protective order consistent with this opinion.
I. Background
In November 2008, California voters approved Proposition 8, an initiative measure providing that “[o]nly marriage between a man and a woman is valid or recognized in California.” Cal. Const, art. I, § 7.5. The California Supreme Court has upheld Proposition 8 against several state constitutional challenges.
Strauss v. Horton,
After the Attorney General declined to defend the constitutionality of Proposition 8, the district court granted a motion by Proponents — the official proponents of Proposition 8 and the official Proposition 8 campaign committee — to intervene as defendants.
*1153 Plaintiffs served requests for production of documents on Proponents under Federal Rule of Civil Procedure 34. Plaintiffs’ eighth request sought:
All versions of any documents that constitute communications referring to Proposition 8, between you and any third party, including, without limitation, members of the public or the media.
The parties understand this request as encompassing, among other things, Proponents’ internal campaign communications concerning strategy and messaging.
Proponents objected to the request as irrelevant, privileged under the First Amendment and unduly burdensome and filed a motion for a protective order. They argued that their internal campaign communications, including draft versions of communications never actually disseminated to the electorate at large, were privileged under the First Amendment. They offered evidence that the disclosure of internal strategy documents would burden political association rights by discouraging individuals from participating in initiative campaigns and by muting the exchange of ideas within those campaigns. They asserted that the documents plaintiffs sought were irrelevant to the issues in this case, and even if they were relevant, the First Amendment interests at stake outweighed plaintiffs’ need for the information.
Plaintiffs opposed the motion for protective order. They argued that their request was reasonably calculated to lead to the discovery of admissible evidence concerning the purpose of Proposition 8, as well as evidence concerning the rationality and strength of Proponents’ purported state interests for Proposition 8. They disputed Proponents’ contention that any of the documents requested were privileged other than with respect to the names of rank-and-file members of the campaign, which they agreed to redact.
In an October 1, 2009 order, the district court granted in part and denied in part Proponents’ motion for a protective order. The court denied Proponents’ claims of privilege. 1 The court also determined that plaintiffs’ request was “reasonably calculated to lead to the discovery of admissible evidence” regarding voter intent, the purpose of Proposition 8 and whether Proposition 8 advances a legitimate governmental interest. The court said that “communications between proponents and political consultants or campaign managers, even about messages contemplated but not actually disseminated, could fairly readily lead to admissible evidence illuminating the messages disseminated to voters.” 2
Following the court’s October 1 order, Proponents submitted a sample of documents potentially responsive to plaintiffs’ document request for in camera review, *1154 asserting that the documents were both irrelevant and privileged. In a November 11, 2009 order following that review, the district court again rejected Proponents’ argument that their internal campaign communications were privileged under the First Amendment:
Proponents have not ... identified anyway in which the ... privilege could protect the disclosure of campaign communications or the identities of high ranking members of the campaign.... If the ... privilege identified by proponents protects anything, it is the identities of rank-and-file volunteers and similarly situated individuals.
Applying the usual discovery standards of Federal Rule of Civil Procedure 26, the court determined that documents falling into the following categories were reasonably likely to lead to the discovery of admissible evidence: documents relating to “messages or themes conveyed to voters through advertising or direct messaging,” documents dealing “directly with advertising or messaging strategy and themes” and documents discussing voters’ “potential reactions” to campaign messages. The court ordered production of 21 of the 60 documents submitted for review.
Proponents appealed from the October 1 and November 11 orders and, in the alternative, petitioned for a writ of mandamus. We granted Proponents’ motion for a stay pending appeal. We now grant the petition for a writ of mandamus.
II. Jurisdiction
Proponents contend that we have jurisdiction on two bases. First, they assert that the district court’s orders are appeal-able under the collateral order doctrine. Second, they have petitioned for issuance of a writ of mandamus.
While this appeal was pending, the Supreme Court decided
Mohawk Industries, Inc. v. Carpenter,
558 U.S. -,
A. Collateral Order Doctrine
We have jurisdiction to review “final decisions of the district courts.” 28 U.S.C. § 1291. Under the collateral order doctrine, a litigant may appeal “from a narrow class of decisions that do not terminate the litigation, but must, in the interest of ‘achieving a healthy legal system,’ nonetheless be treated as ‘final.’ ”
Digital Equip. Corp. v. Desktop Direct, Inc.,
The first prong is easily satisfied in this case. Taken together, the October 1 and November 11 discovery orders conclusively determined the scope of the First
*1155
Amendment privilege. The district court concluded that the privilege does not extend to internal campaign communications and that it is limited to the disclosure of identities of rank-and-file members and other similarly situated individuals. Furthermore, in the November 11 order, the district court conclusively determined that Proponents were required to produce 21 documents that, according to the court, were not privileged.
See United States v. Griffin,
The second prong is also satisfied. The overall scope of the First Amendment privilege is a question of law that is entirely separate from the merits of the litigation. In theory, the application of the privilege to plaintiffs’ specific discovery requests has some overlap with merits-related issues, such as whether plaintiffs’ substantive claims are governed by strict scrutiny or rational basis review and whether plaintiffs may rely on certain types of evidence to prove that Proposition 8 was enacted for an improper purpose. We need not, and do not, delve into those questions in this appeal, however. We assume without deciding that the district court’s rulings on those questions are correct. There is, therefore, no “overlap” between the issues we must decide in this appeal and the “factual and legal issues of the underlying dispute.”
Van Cauwenberghe v. Biard,
It is the third prong that poses the most difficult question. Under
Mohawk,
the third prong turns on whether rulings on First Amendment privilege are, as a class, effectively reviewable on appeal from final judgment — i.e., “whether delaying review until the entry of final judgment’ would imperil a substantial public interest’ or ‘some particular value of a high order.’ ”
Mohawk,
558 U.S. at -,
Some of
Mohawk’s
reasoning carries over to the First Amendment privilege. There are, however, several reasons the class of rulings involving the First Amendment privilege differs in ways that matter to a collateral order appeal analysis from those involving the attorney-client privilege. First, this case concerns a privilege of constitutional dimensions. The right at issue here — freedom of political association — is of a high order. The constitutional nature of the right is not dispositive of the collateral order inquiry,
see, e.g., Flan
*1156
agan v. United States,
In light of these considerations, whether Mohawk should be extended to the First Amendment privilege presents a close question. The distinctions between the First Amendment privilege and the attorney-client privilege — a constitutional basis, a heightened public interest, rarity of invocation and a long recognized chilling effect — are not insubstantial. Given our uncertainty about the availability of collateral order review after Mohawk, we nonetheless assume without deciding that discovery orders denying claims of First Amendment privilege are not reviewable under the collateral order doctrine. Rather, we rely on mandamus to hear this exceptionally important case, for reasons we now explain.
B. Mandamus
The exceptional circumstances presented by this case warrant exercising our jurisdiction under the All Writs Act, 28 U.S.C. § 1651(a).
See Cheney v. U.S. Dist. Court,
“The writ of mandamus is an ‘extraordinary’ remedy limited to ‘extraordinary’ causes.”
Burlington Northern & Santa Fe Ry. Co. v. U.S. Dist. Court,
Mandamus is appropriate to review discovery orders “when particularly impor
*1157
tant interests are at stake.” 16 C. Wright, A. Miller,
&
E. Cooper, Federal Practice and Procedure § 3935.3 (2d ed.2009) (hereinafter Wright
&
Miller). Although “the courts of appeals cannot afford to become involved with the daily details of discovery,” we may rely on mandamus to resolve “new questions that otherwise might elude appellate review” or “to protect important or clear claims of privilege.”
Id.; see Mohawk,
558 U.S. at -,
Consistent with
Schlagenhauf,
we have exercised mandamus jurisdiction to review discovery orders raising particularly important questions of first impression, especially when called upon to define the scope of an important privilege. In
Admiral Insurance,
for example, we granted the mandamus petition to resolve “a significant issue of first impression
concerning
the proper scope of the attorney-client privilege.”
Here, too, we are asked to address an important issue of first impression — the scope of the First Amendment privilege against compelled disclosure of internal campaign communications. Considering the Bauman factors, we conclude that this is an extraordinary case in which mandamus review is warranted.
Assuming, as we are, that no collateral order appeal is available, the first factor is present: “A discovery order ... is interlocutory and non-appealable” under 28 U.S.C. §§ 1291, 1292(a)(1) and 1292(b).
Foley,
The second factor also supports mandamus. A post-judgment appeal would not provide an effective remedy, as “no such review could prevent the damage that[Proponents] allege they will suffer or afford effective relief therefrom.”
In re Cement Antitrust Litig.,
Under the second factor, we also consider the substantial costs imposed on the public interest. The district court applied an unduly narrow conception of First Amendment privilege. Under that interpretation, associations that support or oppose initiatives face the risk that they will be compelled to disclose their internal campaign communications in civil discovery. This risk applies not only to the official proponents of initiatives and referendums, but also to the myriad social, economic, religious and political organizations that publicly support or oppose ballot measures. The potential chilling effect on political participation and debate is therefore substantial, even if the district court’s error were eventually corrected on appeal from final judgment. In this sense, our concerns in this case mirror those we articulated in
Foley,
where the district court denied the city’s motion for a protective order to prevent plaintiffs from deposing city officials about their reasons for passing a zoning ordinance. Absent swift appellate review, we explained, “legislators could be deposed in every case where the governmental interest in a regulation is challenged.”
The third factor, clear error, is also met. As discussed below, we are firmly convinced that the district court erred by limiting the First Amendment privilege to “the identities of rank-and-file volunteers and similarly situated individuals” and affording no greater protection to Proponents’ internal communications than the generous relevance standard of Federal Rule of Civil Procedure 26.
See In re Cement Antitrust Litig.,
Finally, the fifth factor weighs in favor of exercise of our supervisory mandamus authority: we are faced with the need to resolve a significant question of first impression.
See, e.g., Schlagenhauf,
In sum, this is an important case for exercise of our mandamus jurisdiction: adequate, alternative means of review are unavailable; the harm to Proponents and to the public interest is not correctable on appeal; the district court’s discovery order is clearly erroneous; and it presents a significant issue of first impression that may repeatedly evade review. As in
Foley,
a closely analogous case, these factors “remove this case from the category of ordinary discovery orders where interlocutory appellate review is unavailable, through mandamus or otherwise.”
Cheney,
III. First Amendment Privilege 3
A.
“Effective advocacy of both public and private points of view, particularly controversial ones, is undeniably enhanced by group association.”
NAACP v. Alabama,
The government may abridge the freedom to associate directly, or “abridgement of such rights, even though unintended, may inevitably follow from varied forms of governmental action.”
NAACP,
The compelled disclosure of political associations can have just such a chilling effect.
See id.
(“[W]e have repeatedly found that compelled disclosure, in itself, can seriously infringe on privacy of association and belief guaranteed by the First Amendment.”);
AFL-CIO v. FEC,
In this circuit, a claim of First Amendment privilege is subject to a two-part framework. The party asserting the privilege “must demonstrate ... a ‘prima facie showing of arguable first amendment infringement.’ ”
Brock v. Local 375, Plumbers Int’l Union of Am.,
*1161
“If appellants can make the necessary
prima facie
showing, the evidentiary burden will then shift to the government ... [to] demonstrate that the information sought through the [discovery] is rationally related to a compelling governmental interest ... [and] the ‘least restrictive means’ of obtaining the desired information.”
Id.; see also Dole v. Serv. Employees Union, AFL-CIO, Local 280,
To implement this standard, we “balance the burdens imposed on individuals and associations against the significance of the ... interest in disclosure,”
AFL-CIO v. FEC,
Before we apply these rules to the discovery at issue on this appeal, we address the district court’s apparent conclusion that the First Amendment privilege, as a categorical matter, does not apply to the disclosure of internal campaign communications.
B.
The district court concluded that “[i]f the ... privilege identified by proponents protects anything, it is the identities of rank-and-file volunteers and similarly situated individuals,” and said that “Proponents have not ... identified a way in
*1162
which the ... privilege could protect the disclosure of campaign communications.” The First Amendment privilege, however, has never been limited to the disclosure of identities of rank-and-file members.
See, e.g., Degregory,
First, the disclosure of such information can have a deterrent effect on participation in campaigns. There is no question that participation in campaigns is a protected activity.
See San Francisco County Democratic Cent. Comm. v. Eu,
Second, disclosure of internal campaign information can have a deterrent effect on the free flow of information within campaigns. Implicit in the right to associate with others to advance one’s shared political beliefs is the right to exchange ideas and formulate strategy and messages, and to do so in private. 9 Com *1163 pelling disclosure of internal campaign communications can chill the exercise of these rights.
In identifying two ways in which compelled disclosure of internal campaign communications can deter protected activities — by chilling participation and by muting the internal exchange of ideas — we do not suggest this is an exhaustive list. Disclosures of the sort challenged here could chill protected activities in other ways as well. 10 We cite these two examples for purposes of illustration only, and because they are relevant to the assertions of privilege made by Proponents here.
C.
In this case, Proponents have made “a
‘prima facie
showing of arguable first amendment infringement’ ” by demonstrating “consequences which objectively suggest an impact on, or ‘chilling’ of, ... associational rights.”
Brock,
I can unequivocally state that if the personal, non-public communications I have had regarding this ballot initiative— communications that expressed my personal political and moral views — are ordered to be disclosed through discovery in this matter, it will drastically alter how I communicate in the future.... I will be less willing to engage in such communications knowing that my private thoughts on how to petition the government and my private political and moral views may be disclosed simply because of my involvement in a ballot initiative campaign. I also would have to seriously consider whether to even become an official proponent again.
Although the evidence presented by Proponents is lacking in particularity, it is consistent with the self-evident conclusion that important First Amendment interests are implicated by the plaintiffs’ discovery request. The declaration creates a reasonable inference that disclosure would have the practical effects of discouraging political association and inhibiting internal campaign communications that are essential to effective association and expression.
See Dole,
The Proponents having made a prima facie showing of infringement, the evidentiary burden shifts to the plaintiffs to demonstrate a sufficient need for the discovery to counterbalance that infringement. The district court did not apply this heightened relevance test. Rather, having determined that the First Amendment privilege does not apply to the disclosure of internal campaign communications except to protect the identities of rank-and-file members and volunteers, the court applied the Rule 26 standard of reasonably calculated to lead to the discovery of admissible evidence. We agree with the district court that plaintiffs’ request satisfies the Rule 26 standard. Plaintiffs’ request is reasonably calculated to lead to the discovery of admissible evidence on the issues of voter intent and the existence of a legitimate state interest.
11
Such discovery might help to identify messages actually conveyed to voters.
See Washington v. Seattle Sch. Dist. No. 1,
The Rule 26 standard, however, fails to give sufficient weight to the First Amendment interests at stake. Given Proponents’ prima facie showing of infringement, we must apply the First Amendment’s more demanding heightened relevance standard. Doing so, we cannot agree that plaintiffs have “demonstrated an interest in obtaining the disclosures ... which is sufficient to justify the deterrent effect ... on the free exercise ... of [the] constitutionally protected right of association.”
NAACP,
In sum, although the First Amendment interests at stake here are not as weighty as in some of the membership list cases, and harms can be mitigated in part by entry of a protective order, Proponents have shown that discovery would likely have a chilling effect on political association and the formulation of political expression. On the other side of the ledger, plaintiffs have shown that the information they seek is reasonably calculated to lead to the discovery of admissible evidence, but, bearing in mind other sources of information, they have not shown a sufficient need for the information. The information plaintiffs seek is attenuated from the issue of voter intent, while the intrusion on First Amendment interests is substantial. 13
Accordingly, we grant the petition for a writ of mandamus. Proponents have made a prima facie showing of infringement. Plaintiffs have not shown the requisite need for the information sought. The district court shall enter a protective order consistent with this opinion.
PETITION GRANTED. Each party shall bear its costs on appeal.
*1166 APPENDIX
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Notes
. The district court also observed that Proponents had failed to produce a privilege log required by Federal Rule of Civil Procedure 26(b)(5)(A)(ii). We agree that some form of a privilege log is required and reject Proponents’ contention that producing any privilege log would impose an unconstitutional burden.
. The court indicated that plaintiffs' request was
appropriate to the extent it calls for (1) communications by and among proponents and their agents (at a minimum, Schubert Flint Public Affairs) concerning campaign strategy and (2) communications by and among proponents and their agents concerning messages to be conveyed to voters, ... without regard to whether the messages were actually disseminated or merely contemplated. In addition, communications by and among proponents with those who assumed a directorial or managerial role in the Prop 8 campaign, like political consultants or ProtectMarriage.com’s treasurer and executive committee, among others, would appear likely to lead to discovery of admissible evidence.
. We review de novo a determination of privilege.
United States v. Ruehle,
.
See, e.g., NAACP,
. This privilege applies to discovery orders "even if all of the litigants are private entities.”
Grandbouche
v.
Clancy,
. A protective order limiting the dissemination of disclosed associational information may mitigate the chilling effect and could weigh against a showing of infringement. The mere assurance that private information will be narrowly rather than broadly disseminated, however, is not dispositive. See Dole v. Serv. Employees Union, AFL-CIO, Local 280, 950 F.2d 1456, 1461 (9th Cir.1991) ("[N]either letter suggests that it is the unlimited nature of the disclosure of the Union minutes that underlies the member’s unwillingness to attend future meetings. Rather, both letters exhibit a concern for the consequences that *1161 would flow from any disclosure of the contents of the minutes to the government or any government official.”).
. Courts generally apply some combination of these factors.
See, e.g., In re Motor Fuel Temperature Sales Practices Litig.,
. In addition to discouraging individuals from joining campaigns, the threat that internal campaign communications will be disclosed in civil litigation can discourage organizations from joining the public debate over an initiative. See Letter brief of Amicus Curiae American Civil Liberties Union of Northern California, at 2(explaining that the ACLU's internal campaign information has been subpoenaed in this case).
. We derive this conclusion from cases that have recognized the right of associations to be free of infringements in their internal affairs. The freedom of members of a political association to deliberate internally over strategy and messaging is an incident of associational autonomy. We recognized this right in
San Francisco County Democratic Central Committee v. Eu,
where we said that "the right of association would be hollow without a corollary right of self-governance."
.
See AFL-CIO v. FEC,
. The parties dispute whether plaintiffs' substantive claims are governed by strict scrutiny or rational basis review. They also disagree about what types of evidence may be relied upon to demonstrate voter intent. These issues are beyond the scope of this appeal. We assume without deciding that the district court has decided these questions correctly.
. We emphasize that our holding is limited to
private, internal
campaign communications concerning the
formulation of campaign strategy and messages. See In re Motor Fuel Temperature Sales Practices Litig.,
Our holding is therefore limited to communications among the core group of persons engaged in the formulation of campaign strategy and messages. We leave it to the district court, which is best acquainted with the facts of this case and the structure of the “Yes on 8” campaign, to determine the persons who logically should be included in light of the First Amendment associational interests the privilege is intended to protect. Our holding is also limited to private, internal communications regarding formulation of strategy and messages. It certainly does not apply to documents or messages conveyed to the electorate at large, discrete groups of voters or individual voters for purposes such as persuasion, recruitment or motivation — activities beyond the formulation of strategy and messages. Similarly, communications soliciting active support from actual or potential Proposition 8 supporters are unrelated to the formulation of strategy and messages. The district court may require the parties to redact the names of individuals with respect to these sorts of communications, but the contents of such communications are not privileged under our holding.
By way of illustration, plaintiffs produced at oral argument a letter from Bill Tam, one of Proposition 8's official proponents, urging “friends” to “really work to pass Prop 8.” A copy of the letter is appended to this opinion. Mr. Tam’s letter is plainly not a private, internal formulation of strategy or message and is thus far afield from the kinds of communications the First Amendment privilege protects.
. We do not foreclose the possibility that some of Proponents' internal campaign communications may be discoverable. We are not presented here with a carefully tailored request for the production of highly relevant information that is unavailable from other sources that do not implicate First Amendment associational interests. We express no opinion as to whether any particular request would override the First Amendment interests at stake.
