In it the Supreme Court reversed the conviction of the president of a local union for violating an Alabama statute that prohibited only labor picketing.

[2] United States v. Socony-Vacuum Oil Company, 310 U.S. 150 (1940), is a landmark anti-trust decision of the Supreme Court widely cited for the proposition that price-fixing is illegal per se.

[3] In Cantwell v. Connecticut, 310 U.S. 296 (1940), the Supreme Court held that the First Amendment's federal protection of religious free exercise incorporates via the Due Process Clause of the Fourteenth Amendment and so applies to state governments too.

The Supreme Court ruled that public schools could compel students (in this case, Jehovah's Witnesses) to salute the American flag and recite the Pledge of Allegiance despite the students' religious objections to these practices.

The Supreme Court overruled this decision three years later in West Virginia State Board of Education v. Barnette (1943).