👉 A veto is a device used in the United States Congress to prevent votes on certain bills. When a bill is being considered, a proposal can be made by a member of the House or Senate, and if the proposal has not been voted upon, it can be referred to the floor for a vote. If a member objects to the proposal being voted on, they may use the veto device to prevent it from being taken up. This is done through a formal process called "veto-proofing,"