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:
SCRANTON, GOVERNOR OF PENNSYLVANIA, et al. v. DREW et al.
No. 201.
Decided November 16, 1964.
Walter E. Alessandroni, Attorney General of Pennsylvania, and Edward Friedman and Alan Miles Ruben, Deputy Attorneys General, for appellants. Marvin Comisky, Thomas D. McBride, Goncer M. Krestal and Marshall J. Seidman for appellees.
Per Curiam.
The judgment of the District Court appealed from was entered on April 9, 1964, 229 F. Supp. 310 (D. C. M. D. Pa.). The District Court held invalid under the Four- ' teenth Amendment to the United States Constitution, the Pennsylvania Representative Apportionment Act of January 9, 1964, P. L. 1419, 25 Purdon’s Pa. Stat. Ann. §§ 2221-2222 (1963 Supp., including Acts of the 1963 Extra Session), the Pennsylvania Senatorial Apportionment Act of January 9, 1964, P. L. 1432, 25 Purdon’s Pa. Stat. Ann. §§2217-2220 (1963 Supp., including Acts of the 1963 Extra Session), and the Pennsylvania Constitution’s legislative apportionment provisions, Art. II, §§16, 17. The court restrained appellants from conducting any future elections under the apportionment acts, but stayed its order pending the disposition of an appeal to this Court. Thereafter on June 15, 1964, this Court decided Reynolds v. Sims, 377 U. S. 533, and companion cases: WMCA, Inc. v. Lomenzo, 377 U. S. 633; Maryland Comm. for Fair Representation v. Tawes, 377 U. S. 656; Davis v. Mann, 377 U. S. 678; Roman v. Sincock, 377 U. S. 695; Lucas v. Forty-Fourth General Assembly of Colorado, 377 U. S. 713. On September 29, 1964, the Supreme Court of Pennsylvania handed down a decision construing the legislative apportionment provisions of the Pennsylvania Constitution, and holding these provisions constitutional as construed. The court, however, declared invalid, under the Fourteenth Amendment to the United States. Constitution, the Pennsylvania legislative apportionment laws at issue in this appeal. Butcher v. Bloom, 415 Pa. 438, 203 A. 2d 556. The Pennsylvania court retained jurisdiction of the case, stating:
“We have indicated that it is our expectation that the Legislature will proceed in timely fashion to enact reapportionment laws which conform to constitutional requirements. We must recognize, however, that if the General Assembly fails to act in a timely fashion, we shall be obliged to take necessary affirmative action to insure that the 1966 election of Pennsylvania legislators will be conducted pursuant to a constitutionally valid plan. Proper regard for our responsibility compels us to retain jurisdiction of this matter pending legislative action.
“Should the Legislature fail to enact a constitutionally valid plan of reapportionment as soon as practical, but not later than September 1, 1-965, we shall take such action as may be appropriate in light of the then existing situation.
“Jurisdiction retained in accordance with this opinion.” Id., at 468-469, 203 A. 2d, at 573.
The judgment of the District Court is therefore vacated and the cause is remanded for further consideration in light of the decisions supervening since the entry of the judgment of the District Court.
Vacated and remanded.

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