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:
PHILADELPHIA NEWSPAPERS, INC., et al. v. JEROME, JUDGE
No. 77-308.
Decided January 9, 1978
Together with Equitable Publishing Co., Inc., et al. v. Honeyman, Judge; Montgomery Publishing Co. v. Honeyman, Judge; Equitable Publishing Co., Inc., et al. v. Brown, Judge; and Montgomery Publishing Co. v. Brown, Judge, also on appeal from the same court (see this Court’s Rule 15 (3)).
Per Curiam.
The proceedings below were brought to gain access by the press and public to pretrial suppression hearings in three separate state criminal proceedings. Access was denied and the trial judges closed all pretrial hearings and sealed and impounded all papers, documents, and records filed in the cases. The judges also prohibited the parties, their attorneys, public officials, and certain others, from disseminating information concerning the hearings. Appellants then filed petitions for writs of mandamus with the Supreme Court of Pennsylvania. However, these were denied without opinion. Appellants, arguing that they have been denied their federal constitutional rights, now urge us to take appellate jurisdiction of these matters under 28 U. S. C. § 1257 (2).
As matters now stand, the record does not disclose whether the Supreme Court of Pennsylvania passed on appellants’ federal claims or whether it denied mandamus on an adequate and independent state ground. For this reason, we vacate the judgments of the Supreme Court, and remand the cause to that court for such further proceedings as it may deem appropriate to clarify the record. See California v. Krivda, 409 U. S. 33 (1972).
So ordered.

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