Filibusters and Cloture in the Senate

Richard S. Beth
Specialist on Congress and the Legislative Process

Valerie Heitshusen
Analyst on Congress and the Legislative Process

Betsy Palmer
Analyst on Congress and the Legislative Process

The filibuster is widely viewed as one of the Senate's most characteristic procedural features. Filibustering includes any use of dilatory or obstructive tactics to block a measure by preventing it from coming to a vote. The possibility of filibusters exists because Senate rules place few limits on Senators' rights and opportunities in the legislative process. 

In particular, a Senator who seeks recognition usually has a right to the floor if no other Senator is speaking, and then may speak for as long as he or she wishes. Also, there is no motion by which a simple majority of the Senate can stop a debate and allow the Senate to vote in favor of an amendment, a bill or resolution, or any other debatable question. Almost every bill, indeed, is potentially subject to two filibusters before the Senate votes on whether to pass it: first, a filibuster on a motion to proceed to the bill's consideration; and second, after the Senate agrees to this motion, a filibuster on the bill itself. 

Senate Rule XXII, however, known as the "cloture rule," enables Senators to end a filibuster on any debatable matter the Senate is considering. Sixteen Senators initiate this process by presenting a motion to end the debate. The Senate does not vote on this cloture motion until the second day of session after the motion is made. Then, for most matters, it requires the votes of at least three-fifths of all Senators (normally 60 votes) to invoke cloture. (Invoking cloture on a proposal to amend the Senate's standing rules requires the support of two-thirds of the Senators present and voting.) 

The primary effect of invoking cloture on a question is to impose a maximum of 30 additional hours for considering that question. This 30-hour period for consideration encompasses all time consumed by roll call votes, quorum calls, and other actions, as well as the time used for debate. During this 30-hour period, in general, no Senator may speak for more than one hour (although several Senators can have additional time yielded to them). Under cloture, as well, the only amendments that Senators can offer are amendments that are germane and that were submitted in writing before the cloture vote took place. Finally, the presiding officer also enjoys certain additional powers under cloture: for example, to count to determine whether a quorum is present, and to rule amendments, motions, and other actions out of order on the grounds that they are dilatory. 

The ability of Senators to engage in filibusters has a profound and pervasive effect on how the Senate conducts its business on the floor. In the face of a threatened filibuster, for example, the majority leader may decide not to call a bill up for floor consideration, or to defer calling it up if there are other, equally important bills that the Senate can consider and pass without undue delay. Similarly, the prospect of a filibuster can persuade a bill's proponents to accept changes in the bill that they do not support, but that are necessary to prevent an actual filibuster.


Date of Report: March 12, 2010
Number of Pages: 25
Order Number: RL30360
Price: $29.95

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