In Cramp v. Board of Public Instruction of Orange County, the U.S. Supreme Court ruled in favor of a Florida teacher who had been fired for refusing to sign a loyalty oath as required by state law. The court held that the Florida statute was unconstitutional because it violated due process rights under the Fourteenth Amendment, specifically noting its vagueness and lack of clear standards for enforcement. This decision reaffirmed that laws requiring loyalty oaths must be specific and clearly defined to avoid arbitrary enforcement or punishment based on political beliefs or affiliations.

In the dissenting opinion for Cramp v. Board of Public Instruction of Orange County, Justice Frankfurter argued that the loyalty oath required by Florida law was not unconstitutionally vague or overbroad. He contended that it is within a state's rights to ensure its employees are loyal and do not support overthrowing the government through forceful means. The justice believed that while some phrases in the oath might be ambiguous, they should be interpreted in context rather than isolation, which would make their meaning clear enough to meet constitutional standards. Furthermore, he suggested that if there were any doubts about specific terms used in the statute such as "aid" or "comfort," these could have been clarified by asking appropriate authorities instead of assuming them unconstitutional immediately.