*833 In this petition for a writ of mandamus, the defendants ask us to direct the district court to dismiss a case seeking various environmental remedies. The defendants argue that allowing the case to proceed will result in burdensome discovery obligations on the federal government that will threaten the separation of powers. We have jurisdiction over this petition pursuant to the All Writs Act, 28 U.S.C. § 1651 . Because the defendants have not met the high bar for mandamus relief, we deny the petition.

Twenty-one young plaintiffs brought suit against the United States, the President, and various Executive Branch officials and agencies, alleging that the defendants have contributed to climate change in violation of the plaintiffs' constitutional rights. They allege that the defendants have known for decades that carbon dioxide emissions from the burning of fossil fuels destabilize the climate. The plaintiffs aver that the defendants have nevertheless enabled and continue to enable, through various government policies, the burning of fossil fuels, allowing atmospheric carbon dioxide concentrations to reach historically unprecedented levels. They allege that climate change is injuring them and will continue to injure them. The plaintiffs claim that, in light of these facts, the defendants have violated their constitutional rights.

The defendants moved to dismiss the suit for lack of jurisdiction and for failure to state a claim. The district court denied the motion. The court held that the plaintiffs plausibly alleged that they have Article III standing, did not raise non-justiciable political questions, and asserted plausible claims under the Due Process Clause of the Fifth Amendment.

The defendants moved the district court to stay the litigation and to certify its order for interlocutory appeal pursuant to 28 U.S.C. § 1292 (b). The district court denied the motions. Anticipating burdensome discovery, the defendants petitioned this Court for a writ of mandamus and requested a stay of the litigation. In their petition, *834 the defendants ask that we direct the district court to dismiss the case. We granted the request for a stay and now consider the petition.

"The writ of mandamus is a drastic and extraordinary remedy reserved for really extraordinary causes." In re Van Dusen , 654 F.3d 838 , 840 (9th Cir. 2011) (quoting Ex parte Fahey , 332 U.S. 258 , 259-60, 67 S.Ct. 1558 , 91 L.Ed. 2041 (1947) ) (internal quotation marks omitted). "[O]nly exceptional circumstances amounting to a judicial usurpation of power or a clear abuse of discretion will justify the invocation of this extraordinary remedy." Cheney v. U.S. Dist. Ct. , 542 U.S. 367 , 380, 124 S.Ct. 2576 , 159 L.Ed.2d 459 (2004) (internal quotation marks and citations omitted). In considering whether to grant a writ of mandamus, we are guided by the five factors identified in Bauman v. U.S. Dist. Ct. , 557 F.2d 650 (9th Cir. 1977) :

Perry v. Schwarzenegger , 591 F.3d 1147 , 1156 (9th Cir. 2010) (citing Bauman , 557 F.2d at 654-55 ). "All factors are not relevant in every case and the factors may point in different directions in any one case." Christensen v. U.S. Dist. Ct. , 844 F.2d 694 , 697 (9th Cir. 1988).

III

The defendants do not satisfy the Bauman factors at this stage of the litigation. The issues that the defendants raise on mandamus are better addressed through the ordinary course of litigation. We therefore decline to exercise our discretion to grant mandamus relief. See San Jose Mercury News, Inc. v. U.S. Dist. Ct. , 187 F.3d 1096 , 1099 (9th Cir. 1999) ("Mandamus review is at bottom discretionary-even where [all] the Bauman factors are satisfied, the court may deny the petition.").

The first Bauman factor is whether the petitioner will "ha[ve] no other means ... to obtain the desired relief." Perry , 591 F.3d at 1156 . This factor ensures that a writ of mandamus will not "be used as a substitute for appeal even though hardship may result from delay and perhaps unnecessary trial." Schlagenhauf v. Holder , 379 U.S. 104 , 110, 85 S.Ct. 234 , 13 L.Ed.2d 152 (1964) (internal citation omitted). Here, the defendants argue that mandamus is their only means of obtaining relief from potentially burdensome discovery.

The defendants' argument fails because the district court has not issued a single discovery order, nor have the plaintiffs filed a single motion seeking to compel discovery. Rather, the parties have employed the usual meet-and-confer process of resolving discovery disputes. See Fed. R. Civ. P. 37(a)(1). Indeed, both sides have submitted declarations attesting that they have thus far resolved a number of discovery disputes without either side asking the district court for an order. Indeed, the plaintiffs have withdrawn a number of requests *835 for production. The defendants rely on informal communications as to the scope of discovery-in particular, the plaintiffs' litigation hold and demand letter-but the plaintiffs have clarified that these communications were not discovery requests.

If a specific discovery dispute arises, the defendants can challenge that specific discovery request on the basis of privilege or relevance. See McDaniel v. U.S. Dist. Ct. , 127 F.3d 886 , 888-89 (9th Cir. 1997) (per curiam) (holding that mandamus "is not the State's only adequate means of relief" from burdensome discovery because, "as discovery proceeds, the State is not foreclosed from making routine challenges to specific discovery requests on the basis of privilege or relevance"). In addition, the defendants can seek protective orders, as appropriate, under Federal Rule of Civil Procedure 26(c).

Mandamus relief is inappropriate where the party has never sought relief before the district court to resolve a discovery dispute. As we have noted, "courts of appeals cannot afford to become involved with the daily details of discovery." In re Anonymous Online Speakers , 661 F.3d 1168 , 1173 (9th Cir. 2011) (quoting Perry , 591 F.3d at 1157 ). Rather, we have only granted mandamus relief to review discovery orders in exceptional circumstances. Id. And neither we nor the Supreme Court have ever done so before a party has filed a motion for a protective order in the district court or prior to the issuance of a discovery order by the district court. The defendants will have ample remedies if they believe a specific discovery request from the plaintiffs is too broad or burdensome. Absent any discovery order from the district court, or even any attempt to seek one, however, the defendants have not shown that they have no other means of obtaining relief from burdensome or otherwise improper discovery.

The defendants rely on two cases in which a writ of mandamus issued because of alleged discovery burdens: Cheney , and Credit Suisse v. U.S. Dist. Ct. , 130 F.3d 1342 (9th Cir. 1997). In both cases, the district courts had issued orders compelling document production. Cheney , 542 U.S. at 376 , 379 , 124 S.Ct. 2576 (defendant moved for a protective order, but district court issued order allowing discovery to proceed); Credit Suisse , 130 F.3d at 1346 (district court issued order compelling defendants to respond to discovery requests). 1

Absent any district court order concerning discovery, mandamus relief is inappropriate. If the defendants become aggrieved by a future discovery order, they can seek mandamus relief as to that order. But their current request for mandamus relief is entirely premature. The defendants have not satisfied the first Bauman factor.

The second Bauman factor is whether the petitioner "will be damaged or prejudiced in any way not correctable on appeal." Perry , 591 F.3d at 1156 . To satisfy this factor, the defendants "must demonstrate some burden ... other than the mere cost and delay that are the regrettable, *836 yet normal, features of our imperfect legal system." DeGeorge v. U.S. Dist. Ct. , 219 F.3d 930 , 935 (9th Cir. 2000) (alteration in original) (quoting Calderon v. U.S. Dist. Ct. , 163 F.3d 530 , 535 (9th Cir. 1998) (en banc) ). Prejudice serious enough to warrant mandamus relief "includes situations in which one's 'claim will obviously be moot by the time an appeal is possible,' or in which one 'will not have the ability to appeal.' " Id. (quoting Calderon , 163 F.3d at 535 ).

The defendants argue that holding a trial on the plaintiffs' claims and allowing the district court potentially to grant relief would threaten the separation of powers. We are not persuaded that simply allowing the usual legal processes to go forward will have that effect in a way not correctable on appellate review.

First, to the extent the defendants argue that the President himself has been named as a defendant unnecessarily and that defending this litigation would unreasonably burden him, this argument is premature because the defendants never moved in the district court to dismiss the President as a party. See United States v. U.S. Dist. Ct. , 384 F.3d 1202 , 1205 (9th Cir. 2004) (explaining that there is no injustice from declining to consider a new issue on mandamus review because a petitioner may still be able to raise the issue below). Nor has any formal discovery been sought against the President.

To the extent that the defendants are arguing that executive branch officials and agencies in general should not be burdened by this lawsuit, Congress has not exempted the government from the normal rules of appellate procedure, which anticipate that sometimes defendants will incur burdens of litigating cases that lack merit but still must wait for the normal appeals process to contest rulings against them. The United States is a defendant in close to one-fifth of the civil cases filed in federal court. 2 The government cannot satisfy the burden requirement for mandamus simply because it, or its officials or agencies, is a defendant.

Distilled to its essence, the defendants' argument is that it is a burden to defend against the plaintiffs' claims, which they contend are too broad to be legally sustainable. That well may be. But, as noted, litigation burdens are part of our legal system, and the defendants still have the usual remedies before the district court for nonmeritorious litigation, for example, seeking summary judgment on the claims. And if relief is not forthcoming, any legal error can be remedied on appeal. "The first two criteria articulated in Bauman are designed to insure that mandamus, rather than some other form of relief, is the appropriate remedy." In re Cement Antitrust Litig. (MDL No. 296) , 688 F.2d 1297 , 1301 (9th Cir. 1982), aff'd sub nom. Arizona v. U.S. Dist. Ct. , 459 U.S. 1191 , 103 S.Ct. 1173 , 75 L.Ed.2d 425 (1983) (mem.). Because the merits errors now asserted are correctable through the ordinary course of litigation, the defendants have not satisfied the second Bauman factor.

The third Bauman factor is whether the district court's order "is clearly erroneous as a matter of law." Perry , 591 F.3d at 1156 . Our review of this factor "is significantly deferential and [this factor] is not *837 met unless the reviewing court is left with a definite and firm conviction that a mistake has been committed." In re Bundy , 840 F.3d 1034 , 1041 (9th Cir. 2016) (quoting In re United States , 791 F.3d 945 , 955 (9th Cir. 2015) ).

"The absence of controlling precedent weighs strongly against a finding of clear error [for mandamus purposes]." In re Van Dusen , 654 F.3d 838 , 845 (9th Cir. 2011). Here, the defendants concede that there is no controlling Ninth Circuit authority on any of the theories asserted by the plaintiffs. Indeed, the defendants strongly argue that the theories are unprecedented. Thus, the absence of controlling precedent in this case weighs strongly against a finding of clear error. Id .

We also underscore that this case is at a very early stage, and that the defendants have ample opportunity to raise legal challenges to decisions made by the district court on a more fully developed record, including decisions as to whether to focus the litigation on specific governmental decisions and orders. Once the litigation proceeds, the defendants will have ample opportunity to raise and litigate any legal objections they have.

However, absent controlling precedent, we decline to exercise our discretion to intervene at this stage of the litigation to review preliminary legal decisions made by the district court or otherwise opine on the merits.

The fourth Bauman factor is whether the district court's order is "an oft repeated error or manifests a persistent disregard of the federal rules." Perry , 591 F.3d at 1156 . Absent controlling authority, there is no "oft-repeated error" in this case, In re Swift Transp. Co. , 830 F.3d at 917, and the defendants do not contend that the district court violated any federal rule. The defendants do not satisfy the fourth factor.

The final factor is whether the district court's order "raises new and important problems or issues of first impression." Perry , 591 F.3d at 1156 . In general, we have relied upon this factor when there is a "novel and important question" that "may repeatedly evade review." Id. at 1159 ; see also In re Cement Antitrust Litig ., 688 F.2d at 1304-05 ("[A]n important question of first impression will evade review unless it is considered under our supervisory mandamus authority. Moreover, that question may continue to evade review in other cases as well.").

There is little doubt that the legal theories asserted in this case raise issues of first impression. But the district court's order denying a motion to dismiss on the pleadings-which is all that has happened thus far-does not present the possibility that those issues will evade appellate review. The defendants have not satisfied the fifth Bauman factor.

There is enduring value in the orderly administration of litigation by the trial courts, free of needless appellate interference. In turn, appellate review is aided by a developed record and full consideration of issues by the trial courts. If appellate review could be invoked whenever a district court denied a motion to dismiss, we would be quickly overwhelmed with such requests, and the resolution of cases would be unnecessarily delayed.

We are mindful that some of the plaintiffs' claims as currently pleaded are quite broad, and some of the remedies the plaintiffs seek may not be available as redress.

*838 However, the district court needs to consider those issues further in the first instance. Claims and remedies often are vastly narrowed as litigation proceeds; we have no reason to assume this case will be any different. Nor would the defendants be precluded from reasserting a challenge to standing, particularly as to redressability, once the record is more fully developed, or from seeking mandamus in the future, if circumstances justify it. And the defendants retain the option of asking the district court to certify orders for interlocutory appeal of later rulings, pursuant to 28 U.S.C. § 1292 (b).

Because petitioners have not satisfied the Bauman factors, we deny the petition without prejudice. Absent any discovery order, the mandamus petition is premature insofar as it is premised on a fear of burdensome discovery. The issues pertaining to the merits of this case can be resolved by the district court, in a future appeal, or, if extraordinary circumstances later present themselves, by mandamus relief. For these reasons, we decline to exercise our discretion to grant mandamus relief at this stage of the litigation.

PETITION DENIED WITHOUT PREJUDICE.

The defendants also raised, via a letter filed after argument, the Supreme Court's recent summary disposition in an appeal challenging a discovery order. See In re United States , --- U.S. ----, 138 S.Ct. 443 , 199 L.Ed.2d 351 (2017). When the government filed a petition for mandamus in that case, the district court had compelled the government to complete the administrative record over the government's opposition that the administrative record was already complete and had deferred ruling on the defendants' earlier motion to dismiss. Neither circumstance exists here.

See U.S. Courts, Federal Judicial Caseload Statistics 2017 , http://www.uscourts.gov/statistics-reports/federal-judicial-caseload-statistics-2017 (last visited Feb. 14, 2018) (The United States was a defendant in 56,987 of the 292,076 civil cases filed in federal court in the 12-month period ending March 31, 2017.).