United States v. U.S. Dist. Court for the Dist. of Or. (In re United States), 884 F.3d 830

Twenty-one young plaintiffs sued the United States, the President, and Executive Branch officials, alleging government policies enabling fossil-fuel combustion have caused constitutional injuries via climate change.
Plaintiffs allege decades-long governmental knowledge of CO2 harms yet continued facilitation of emissions, causing present and future injuries and constitutional violations (Due Process Clause of the Fifth Amendment).
Defendants moved to dismiss for lack of jurisdiction and failure to state a claim; the district court denied the motion, finding plausible Article III standing, no non-justiciable political question, and plausible Fifth Amendment claims.
Defendants sought a stay and interlocutory certification under 28 U.S.C. § 1292(b); the district court denied those requests and did not enter any discovery orders.
Defendants petitioned this court for a writ of mandamus (and obtained a stay) seeking dismissal to avoid allegedly burdensome discovery and separation-of-powers harms.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Whether mandamus is appropriate to prevent anticipated burdensome discovery	Allow litigation to proceed; discovery requests are subject to normal limits	Mandamus is necessary because discovery would be burdensome and threaten separation of powers	Denied: mandamus premature because no discovery order issued and ordinary district-court remedies suffice
Whether defendants lack other adequate means to obtain relief	Normal appellate and district-court procedures suffice	Mandamus is the only adequate remedy to avoid irreparable discovery burdens	Denied: defendants have available motions (protective orders, privilege, relevance objections, §26(c)) and appeal remedies
Whether litigation causes irreparable prejudice not correctable on appeal	Plaintiffs say prospective relief is appropriate; not directly argued as to irreparable prejudice	Litigation burdens and alleged intrusion on Executive will be irreparable	Denied: routine litigation burdens do not justify mandamus; no unique inability to appeal shown
Whether the district court’s denial of dismissal was clearly erroneous as a matter of law	Plaintiffs’ pleadings plausibly allege standing and due process claims	Denial conflicts with precedent and raises novel separation-of-powers issues	Denied: no controlling precedent; early stage; defer to district court for fuller record

Bauman v. U.S. Dist. Ct., 557 F.2d 650 (9th Cir. 1977) (sets five-factor mandamus framework)
Cheney v. U.S. Dist. Ct., 542 U.S. 367 (2004) (mandamus appropriate only in extraordinary circumstances/judicial usurpation)
In re Van Dusen, 654 F.3d 838 (9th Cir. 2011) (mandamus relief is drastic; absence of controlling precedent cuts against clear error)
Perry v. Schwarzenegger, 591 F.3d 1147 (9th Cir. 2010) (discusses Bauman factors and mandamus discretion)
McDaniel v. U.S. Dist. Ct., 127 F.3d 886 (9th Cir. 1997) (mandamus not sole remedy for burdensome discovery; routine challenges available)
In re Anonymous Online Speakers, 661 F.3d 1168 (9th Cir. 2011) (courts of appeals should not involve themselves in daily discovery details)
In re Bundy, 840 F.3d 1034 (9th Cir. 2016) (deferential review of district court in mandamus context)
Credit Suisse v. U.S. Dist. Ct., 130 F.3d 1342 (9th Cir. 1997) (mandamus granted where district court had already compelled discovery)