CITIZEN PUBLISHING CO. et al. v. UNITED STATES

Whether an injunction against a newspaper publisher's attempt to monopolize interstate commerce violates the freedom of the press guaranteed by the First Amendment.

"This case . . . raises questions concerning the constitutional power of a state to apply its antitrade restraint law to labor union activities, and to enjoin union members from peaceful picketing carried on as an essential and inseparable part of a course of conduct which is in violation of the state law. The picketing occurred in Kansas City, Missouri. The injunction was issued by a Missouri state court."