H.R. 4788: To require the District of Columbia to permit Members of Congress who have a valid license or permit which is issued pursuant to the law of a State which permits the Member to carry a concealed firearm, or who is otherwise entitled to carry a concealed firearm in the State in which the Member resides, to carry a concealed firearm in the District of Columbia, and for other purposes.

H.R. 4788 is a federal bill in the 119th Congress. See its sponsors, how members voted, and a plain-English breakdown on PolityLens.