Per Curiam.
Appellee instituted this suit for a declaratory judgment that a 1956 Mississippi statute imposing a charge on public utilities for the use of public streets and places does not apply to it, and, if it does, violates the Federal and State Constitutions. It was tried before a single district judge. After trial the district judge wrote an opinion (154 F. Supp. 736) and then entered a judgment which declared the statute in conflict with the State and Federal Constitutions and thus beyond the power of the Mississippi Legislature to enact. The Court of Appeals for the Fifth Circuit affirmed the judgment of the District Court. 256 F. 2d 83. An appeal was taken to this Court pursuant to 28 U. S. C. § 1254 (2), providing for appeal of a decision of a Court of Appeals where appellant relies on a state statute held to be “invalid as repugnant to the Constitution, treaties or laws of the United States.” Appellee moved to dismiss the appeal, contending that review by appeal does not lie because the Court of Appeals decision declaring the state statute unconstitutional was based on the Constitution of Mississippi as well as the Federal Constitution. Subsequently, appellant moved the Court to vacate the judgment of the Court of Appeals and remand the case to the District Court with instructions to vacate its judgment and convene a three-judge court under 28 U. S. C. §§ 2281 and 2284 to consider appellee’s complaint. Appellee opposed the motion. Without passing judgment on the merits of that motion (cf. Federal Housing Administration v. The Darlington, Inc., 352 U. S. 977), we vacate the judgment of the Court of Appeals and remand the case to the District Court with directions to hold the cause while the parties repair to a state tribunal for an authoritative declaration of applicable state law.
Proper exercise of federal jurisdiction requires that controversies involving unsettled questions of state law be decided in the state tribunals preliminary to a federal court’s consideration of the underlying federal constitutional questions. See Railroad Comm’n v. Pullman Co., 312 U. S. 496. That is especially desirable where the questions of state law are enmeshed with federal questions. Spector Motor Co. v. McLaughlin, 323 U. S. 101, 105. Here, the state law problems are delicate ones, the resolution of which is not without substantial difficulty— certainly for a federal court. Cf. Thompson v. Magnolia Petroleum Co., 309 U. S. 478, 483. In such a case, when the state court’s interpretation of the statute or evaluation of its validity under the state constitution may obviate any need to consider its validity under the Federal Constitution, the federal court should hold its hand, lest it render a constitutional decision unnecessarily. Railroad Comm’n v. Pullman Co., supra; Spector Motor Co. v. McLaughlin, supra, 104-105. See Leiter Minerals, Inc., v. United States, 352 U. S. 220, 228-229.
The judgment of the Court of Appeals is vacated and the cause is remanded to the District Court for proceedings in conformity with this opinion.
What follows is an opinion from the Supreme Court of the United States. Your task is to determine whether the decision of the court whose decision the Supreme Court reviewed was itself liberal or conservative. In the context of issues pertaining to criminal procedure, civil rights, First Amendment, due process, privacy, and attorneys, consider liberal to be pro-person accused or convicted of crime, or denied a jury trial, pro-civil liberties or civil rights claimant, especially those exercising less protected civil rights (e.g., homosexuality), pro-child or juvenile, pro-indigent pro-Indian, pro-affirmative action, pro-neutrality in establishment clause cases, pro-female in abortion, pro-underdog, anti-slavery, incorporation of foreign territories anti-government in the context of due process, except for takings clause cases where a pro-government, anti-owner vote is considered liberal except in criminal forfeiture cases or those where the taking is pro-business violation of due process by exercising jurisdiction over nonresident, pro-attorney or governmental official in non-liability cases, pro-accountability and/or anti-corruption in campaign spending pro-privacy vis-a-vis the 1st Amendment where the privacy invaded is that of mental incompetents, pro-disclosure in Freedom of Information Act issues except for employment and student records. In the context of issues pertaining to unions and economic activity, consider liberal to be pro-union except in union antitrust where liberal = pro-competition, pro-government, anti-business anti-employer, pro-competition, pro-injured person, pro-indigent, pro-small business vis-a-vis large business pro-state/anti-business in state tax cases, pro-debtor, pro-bankrupt, pro-Indian, pro-environmental protection, pro-economic underdog pro-consumer, pro-accountability in governmental corruption, pro-original grantee, purchaser, or occupant in state and territorial land claims anti-union member or employee vis-a-vis union, anti-union in union antitrust, anti-union in union or closed shop, pro-trial in arbitration. In the context of issues pertaining to judicial power, consider liberal to be pro-exercise of judicial power, pro-judicial "activism", pro-judicial review of administrative action. In the context of issues pertaining to federalism, consider liberal to be pro-federal power, pro-executive power in executive/congressional disputes, anti-state. In the context of issues pertaining to federal taxation, consider liberal to be pro-United States and conservative pro-taxpayer. In miscellaneous, consider conservative the incorporation of foreign territories and executive authority vis-a-vis congress or the states or judcial authority vis-a-vis state or federal legislative authority, and consider liberal legislative veto. The lower court's decision direction is unspecifiable if the manner in which the Supreme Court took jurisdiction is original or certification; or if the direction of the Supreme Court's decision is unspecifiable and the main issue pertains to private law or interstate relations