Class v. United States, 583 U.S. ___ (2018), is a Supreme court decision related to the ability to challenge the constitutionality of a federal law if the defendant has already pleaded guilty.

A federal grand jury indicted petitioner, Rodney Class, for possessing firearms in his locked jeep, which was parked on the grounds of the United States Capitol in Washington, D. C. See 40 U.S.C.

After the District Court dismissed both claims, Class pleaded guilty to “Possession of a Firearm on U. S. Capitol Grounds, in violation of 40 U.S.C.

The Court of Appeals held that Class could not do so because, by pleading guilty, he had waived his constitutional claims.

A guilty plea, by itself, does not bar a federal criminal defendant from challenging the constitutionality of his statute of conviction on direct appeal.