In this appeal, we consider whether, in the absence of a request from an unrepresented petitioner, a district court is required to consider,
sua sponte,
the option of staying and abeying a petition for a writ of
habeas corpus
when the petitioner has filed a “mixed” petition consisting of both exhausted and unexhausted claims. We hold that such a requirement would conflict with
Pliler v. Ford,
I
On October 13, 1999, in a California state court, Arthur Robbins, III, pled no contest to possession with intent to sell crack cocaine. He had been arrested after a bag of cocaine had been found on the passenger-side floorboard of the car he was driving. Because Robbins had two prior convictions which the state court declined to excise, the court sentenced him to prison for 25 years to life under California’s “three strikes” law. Robbins appealed, and his appointed appellate attorney filed a
“People v. Wende
brief’ that simply asked the court to conduct an independent review of the record, without raising any specific issues.
See People v. Wende,
After the state appellate court affirmed his conviction, Robbins filed a petition for review with the California Supreme Court. The thrust of Robbins’ argument was that the arresting officer did not have probable cause to pull over the car Robbins was driving. Robbins argued that the arresting officer lied when he testified that he discovered Robbins had a suspended license prior to the stop; rather, the arresting officer learned of the suspended license only after the stop and the discovery of the cocaine. Under this latter scenario, Robbins argued, there was no probable cause to stop the car and the fruits of the search would be tainted. Robbins’ state court petition also argued that his appellate counsel was ineffective for failing to raise the Fourth Amendment defense and the contradictory testimony of the arresting officer, and that the appellate court’s review was objectively unreasonable.
The California Supreme Court denied his petition for review, after which Robbins filed his federal habeas petition on September 30, 2004. His amended habeas petition, filed on December 30, 2004, sought relief on four grounds: (1) trial counsel was ineffective for failing to object to the officer’s contradictory statements; (2) his conviction was obtained through evidence that should have been excluded; (3) appellate counsel was ineffective for failing to appeal any issues, such as trial counsel’s ineffectiveness or the unlawful search and arrest; and (4) it was objective *1146 ly unreasonable for the state courts to summarily deny his arguments on appeal. The Warden moved for dismissal, arguing that Robbins failed to exhaust these claims in state court, and on July 12, 2005, the magistrate judge issued a report recommending the dismissal of Robbins’ habeas petition because the ineffective assistance of trial counsel claim had not been exhausted in state court. The magistrate judge also recommended that Robbins’ fourth claim be dismissed because it failed to state a cognizable federal claim.
The magistrate judge’s report stated that both parties had thirty days in which to file objections to the report, and that otherwise the report would be submitted to the district court for review. The magistrate judge gave Robbins the option of withdrawing his unexhausted claims within thirty days to allow him to proceed with the exhausted claims; the magistrate judge explained that if Robbins did not withdraw the unexhausted claims, the entire “mixed” petition would be dismissed without prejudice to allow Robbins to seek exhaustion before refiling his federal petition. The magistrate judge did not mention that the one-year limitations period imposed by the Antiterrorism and Effective Death Penalty Act of 1996 (“AED-PA”), 28 U.S.C. § 2244(d), had by then expired five months earlier, in February of 2005, and thus that if Robbins’ federal petition were dismissed, he would be unable to re-file in federal court after exhausting his claims in state court. Nor did the magistrate judge advise Robbins of the stay-and-abeyance procedure at issue here. Following the issuance of the report, Robbins did not file any objections and did not request a stay and abeyance or a withdrawal of his unexhausted claims. As a result, the district court adopted in full the magistrate judge’s report and dismissed Robbins’ habeas petition.
We have jurisdiction to review the district court’s denial of a petition for habeas corpus pursuant to 28 U.S.C. § 2253(a). We issued a certificate of appealability (“COA”) on Robbins’ claim that
Kelly v. Small,
We review the district court’s dismissal of a mixed habeas petition de novo.
Olvera v. Giurbino,
II
As a threshold matter, we must determine whether Robbins properly preserved his right to appeal the district court’s decision. The Warden argues that Robbins waived this right by failing to file objections to the magistrate judge’s report within the thirty days provided by the magistrate judge. Indeed, Robbins filed no objections to the report at all, before or after the thirty-day deadline. When no objections were filed, the district court adopted the magistrate judge’s recommendation in full and dismissed Robbins’ habe-as petition because it contained unexhaust-ed claims. Robbins then filed a timely notice of appeal.
“The failure to object in the district court to a magistrate’s finding of fact waives a challenge to that finding.”
United States v. Torf
Robbins’ arguments on appeal implicate his failure to object to the magistrate judge’s legal conclusions concerning state court exhaustion and lack of a federal claim. He does not challenge the magistrate judge’s factual findings. Unlike the party in Martinez, Robbins did raise his arguments in his opening brief to this court. Thus, he is entitled to the “ordinary” presumption that failure to object to the magistrate judge’s report, “standing alone,” does not constitute waiver. See id. at 1156. Moreover, we granted Robbins a COA on an issue that was not and could not have been addressed in the magistrate judge’s report or, indeed, by the district court, because had Robbins been aware of the possibility of the stay-and-abeyance procedure while his case was pending in the district court, he would have requested it outright. The essence of his appeal is that, acting pro se, he was not aware of the stay-and-abeyance procedure and did not request it, thus requiring the district court to consider it without prompting. Robbins’ failure to object to the magistrate judge’s report is, therefore, irrelevant to the claim before us.
Ill
We conclude that a district court is not required
sua sponte
to consider whether it should stay and abey a mixed habeas petition. “Mixed” petitions are those habeas petitions consisting of both exhausted and unexhausted claims.
See Rose v. Lundy,
The Supreme Court has recognized that the interplay between
Lundy
and AEDPA means that “petitioners who come to federal court with ‘mixed’ petitions run the risk of forever losing their opportunity for any federal review of their unexhausted claims.”
Id.
at 275,
In
Calderon v. United States District Court (“Taylor”),
we approved one solution to that conundrum, a three-step stay-and-abeyance procedure in which: (1) the prisoner amends his mixed petition to remove the unexhausted claims; (2) the district court stays and holds in abeyance the amended and fully exhausted petition; and (3) the prisoner re-amends his petition to add the newly-exhausted claims after litigating them in state court.
In
Ford v. Hubbard,
we held that, when faced with a
pro se
habeas petitioner, “the district court was obligated to inform him of his options with respect to his mixed habeas petitions: to advise him that it would have the power to consider his stay motions only if he opted to proceed with his exhausted claims and dismiss the unex-hausted claims.”
The Supreme Court reversed those holdings in
Pliler.
Thus, although the
Taylor
stay-and-abeyance option remains in place for district courts,
Pliler
makes it clear that district courts are not
required
to consider
sua sponte
the stay-and-abeyance procedure. Such a mandatory action by the trial judge falls within the set of “chores” targeted by the Supreme Court in
Pliler.
*1149
See also Brambles v. Duncan,
Robbins argues that there is a distinction between Kelly’s requirement that a court must “consider” the procedure and Pliler’s holding that courts are not required to issue warnings about the use of the procedure. However, there is no difference between “considering” a procedure and notifying a party about the possibility of that procedure, because in both cases the district court must sua sponte inform the party of the procedure, partly so that the petitioner may decide which option to pursue. The district court cannot merely “consider” the stay-and-abeyance option on its own; rather, it must inform both parties of its possible use to enable them to provide the information the court needs to exercise its discretion over whether to stay and abey the petition.
The Supreme Court’s decision in
Rhines v. Weber,
IV
In light of Pliler v. Ford, we conclude that the district court was not required to consider, sua sponte, the stay-and-abeyance procedure. To the extent that Kelly v. Small and its progeny suggest otherwise, those cases are overruled. 3 We affirm the district court’s judgment dismissing Robbins’ mixed petition. We need not, and do not, reach any other issue urged by the parties. 4
AFFIRMED.
Notes
. The Supreme Court recently recognized an exception to the dismissal requirement, permitting district courts to stay mixed petitions in certain circumstances while the petitioner exhausts his unexhausted claims.
Rhines,
. See
Jackson,
. Ordinarily, panels cannot overrule a circuit precedent; that power is reserved to the circuit court sitting en banc.
United States v. Washington,
.Because we conclude that the district court in this case was under no obligation to consider the stay-and-abeyance procedure
sua
*1150
sponte,
we do not reach the Warden's argument that Robbins did not meet the new standards laid out in
Rhines
for applying the procedure. We also do not address whether the
Rhines
requirements apply to the specific type of stay-and-abeyance procedure at issue in
Kelly, see Jackson,
