What follows is an opinion from the Supreme Court of the United States. Your task is to determine the bases on which the Supreme Court rested its decision with regard to the legal provision that the Court considered in the case. Consider "judicial review (national level)" if the majority determined the constitutionality of some action taken by some unit or official of the federal government, including an interstate compact. Consider "judicial review (state level)" if the majority determined the constitutionality of some action taken by some unit or official of a state or local government. Consider "statutory construction" for cases where the majority interpret a federal statute, treaty, or court rule; if the Court interprets a federal statute governing the powers or jurisdiction of a federal court; if the Court construes a state law as incompatible with a federal law; or if an administrative official interprets a federal statute. Do not consider "statutory construction" where an administrative agency or official acts "pursuant to" a statute, unless the Court interprets the statute to determine if administrative action is proper. Consider "interpretation of administrative regulation or rule, or executive order" if the majority treats federal administrative action in arriving at its decision.Consider "diversity jurisdiction" if the majority said in approximately so many words that under its diversity jurisdiction it is interpreting state law. Consider "federal common law" if the majority indicate that it used a judge-made "doctrine" or "rule; if the Court without more merely specifies the disposition the Court has made of the case and cites one or more of its own previously decided cases unless the citation is qualified by the word "see."; if the case concerns admiralty or maritime law, or some other aspect of the law of nations other than a treaty; if the case concerns the retroactive application of a constitutional provision or a previous decision of the Court; if the case concerns an exclusionary rule, the harmless error rule (though not the statute), the abstention doctrine, comity, res judicata, or collateral estoppel; or if the case concerns a "rule" or "doctrine" that is not specified as related to or connected with a constitutional or statutory provision. Consider "Supreme Court supervision of lower federal or state courts or original jurisdiction" otherwise (i.e., the residual code); for issues pertaining to non-statutorily based Judicial Power topics; for cases arising under the Court's original jurisdiction; in cases in which the Court denied or dismissed the petition for review or where the decision of a lower court is affirmed by a tie vote; or in workers' compensation litigation involving statutory interpretation and, in addition, a discussion of jury determination and/or the sufficiency of the evidence.

Opinion:
Michael Damon RIPPO, Petitioner
v.
Renee BAKER, Warden.
No. 16-6316.
Supreme Court of the United States
March 6, 2017.
PER CURIAM.
A Nevada jury convicted petitioner Michael Damon Rippo of first-degree murder and other offenses and sentenced him to death. During his trial, Rippo received information that the judge was the target of a federal bribery probe, and he surmised that the Clark County District Attorney's Office-which was prosecuting him-was playing a role in that investigation. Rippo moved for the judge's disqualification under the Due Process Clause of the Fourteenth Amendment, contending that a judge could not impartially adjudicate a case in which one of the parties was criminally investigating him. But the trial judge declined to recuse himself, and (after that judge's indictment on federal charges) a different judge later denied Rippo's motion for a new trial. The Nevada Supreme Court affirmed on direct appeal, reasoning in part that Rippo had not introduced evidence that state authorities were involved in the federal investigation. Rippo v. State, 113 Nev. 1239, 1246-1250, 946 P.2d 1017, 1023-1024 (1997) (per curiam ).
In a later application for state postconviction relief, Rippo advanced his bias claim once more, this time pointing to documents from the judge's criminal trial indicating that the district attorney's office had participated in the investigation of the trial judge. See, e.g., App. to Pet. for Cert. 236-237, 397. The state postconviction court denied relief, and the Nevada Supreme Court affirmed. Rippo v. State, 132 Nev. ----, ----, 368 P.3d 729, 743-745 (2016). It likened Rippo's claim to the "camouflaging bias" theory that this Court discussed in Bracy v. Gramley, 520 U.S. 899, 117 S.Ct. 1793, 138 L.Ed.2d 97 (1997). The Bracy petitioner argued that a judge who accepts bribes to rule in favor of some defendants would seek to disguise that favorable treatment by ruling against defendants who did not bribe him. Id., at 905, 117 S.Ct. 1793. We explained that despite the "speculative" nature of that theory, the petitioner was entitled to discovery because he had also alleged specific facts suggesting that the judge may have colluded with defense counsel to rush the petitioner's case to trial. See id., at 905-909, 117 S.Ct. 1793. The Nevada Supreme Court reasoned that, in contrast, Rippo was not entitled to discovery or an evidentiary hearing because his allegations "d[id] not support the assertion that the trial judge was actually biased in this case." 132 Nev., at ----, 368 P.3d, at 744.
We vacate the Nevada Supreme Court's judgment because it applied the wrong legal standard. Under our precedents, the Due Process Clause may sometimes demand recusal even when a judge " 'ha[s] no actual bias.' " Aetna Life Ins. Co. v. Lavoie, 475 U.S. 813, 825, 106 S.Ct. 1580, 89 L.Ed.2d 823 (1986). Recusal is required when, objectively speaking, "the probability of actual bias on the part of the judge or decisionmaker is too high to be constitutionally tolerable." Withrow v. Larkin, 421 U.S. 35, 47, 95 S.Ct. 1456, 43 L.Ed.2d 712 (1975) ; see Williams v. Pennsylvania, 579 U.S. ----, ----, 136 S.Ct. 1899, 1905, 195 L.Ed.2d 132 (2016) ("The Court asks not whether a judge harbors an actual, subjective bias, but instead whether, as an objective matter, the average judge in his position is likely to be neutral, or whether there is an unconstitutional potential for bias" (internal quotation marks omitted)). Our decision in Bracy is not to the contrary: Although we explained that the petitioner there had pointed to facts suggesting actual, subjective bias, we did not hold that a litigant must show as a matter of course that a judge was "actually biased in [the litigant's] case," 132 Nev., at ----, 368 P.3d, at 744 -much less that he must do so when, as here, he does not allege a theory of "camouflaging bias." The Nevada Supreme Court did not ask the question our precedents require: whether, considering all the circumstances alleged, the risk of bias was too high to be constitutionally tolerable. As a result, we grant the petition for writ of certiorari and the motion for leave to proceed in forma pauperis, and we vacate the judgment below and remand the case for further proceedings not inconsistent with this opinion.
It is so ordered.
The court further relied on its bias holding to determine that Rippo had not established cause and prejudice to overcome various state procedural bars. 132 Nev., at ----, 368 P.3d, at 745. Because the court below did not invoke any state-law grounds "independent of the merits of [Rippo's] federal constitutional challenge," we have jurisdiction to review its resolution of federal law. Foster v. Chatman, 578 U.S. ----, ----, 136 S.Ct. 1737, 1746, 195 L.Ed.2d 1 (2016).

Question: What is the basis of the Supreme Court's decision?

Choices:
judicial review (national level)
judicial review (state level)
Supreme Court supervision of lower federal or state courts or original jurisdiction
statutory construction
interpretation of administrative regulation or rule, or executive order
diversity jurisdiction
federal common law

Answer: 2