Broadrick v. Oklahoma, 413 U.S. 601 (1973) is a United States Supreme Court decision upholding an Oklahoma statute

Statute

A statute is a formal written enactment of a legislative authority that governs a state, city, or county. Typically, statutes command or prohibit something, or declare policy. The word is often used to distinguish law made by legislative bodies from case law, decided by courts, and regulations...

 which prohibited state employees from engaging in partisan political activities. Broadrick is often cited to enunciate the test for a facial overbreadth challenge, that "the overbreadth of a statute must not only be real, but substantial as well, judged in relation to the statute's plainly legitimate sweep."