What tactic can be used in the Senate to defeat a bill by talking until the bill's sponsor withdraws it?

The tactic used in the Senate to defeat a bill by prolonging debate until the bill's sponsor withdraws it is known as a filibuster. This often involves one or more senators engaging in lengthy speeches or other forms of debate to delay or block a vote on the proposed legislation. The purpose of a filibuster is to force the majority party to either back down on the bill or agree to negotiate changes, as it can create significant pressure on the bill's advocates.

In contrast, cloture is a method to end a filibuster or limit further debate on a bill, requiring a supermajority vote to invoke. A quorum refers to the minimum number of members that must be present for the Senate to conduct its business, while a plebiscite is a vote by the electorate on a specific issue. These terms are related to legislative processes but do not involve the specific strategy of using prolonged speech to undermine a bill’s progress in the Senate.