Proposing an amendment to the Constitution of the United States to allow debate to be closed on any measure, motion, or other matter pending before the Senate only by unanimous consent or the concurrence of three-fifths of the Senators.

Constitutional Amendment - Prohibits the debate upon any measure, motion, or other matter pending before the Senate from being brought to a close except by unanimous consent or the concurrence of three-fifths (60) of the Senators duly chosen and sworn, except on a measure or motion to amend the Senate rules, in which case the necessary affirmative vote shall be two-thirds (66) of the Senators present and voting.