At the federal level, legislative immunity is grounded in the
Speech or Debate Clause of
Article I, Section 6 of the U.S. Constitution, which protects members of
Congress from being questioned elsewhere about their legislative acts. Courts have extended similar protections to state and local legislators. See:
Bogan v. Scott-Harris, 523 U.S. 44 (1998). Most states also provide explicit protection, with the majority including speech or debate clauses in their constitutions.
The protection covers activities that are integral to the legislative process, such as debating, voting, preparing reports, and introducing or drafting legislation. It may also extend to non-legislators performing functions directly related to the legislative process, for example,
a mayor presenting a budget to a city council.
Legislative immunity does not apply to actions outside the legislative sphere. Public statements made at press conferences, political campaigning, or conduct lacking lawful authority, such as using
unconstitutional procedures to pass a bill or seizing documents without proper authorization, fall outside the scope of immunity.
[Last reviewed in October of 2025 by the
Wex Definitions Team]
legislative immunity