Congressional Glossary
What is a filibuster?
A filibuster is a Senate tactic that blocks or delays a vote by refusing to end debate. Most legislation stalls until 60 senators vote to cut debate off.
In one sentence
A filibuster is a Senate tactic that blocks or delays a vote by refusing to end debate. Most legislation stalls until 60 senators vote to cut debate off.
To break one: 60 of 100 senators on most legislation; a simple majority on nominations
What a filibuster means
A filibuster is the use of the Senate's open-ended debate rules to delay or block a vote. House rules cap debate on everything. Senate rules mostly do not, so a measure cannot come to a final vote until debate ends. If a group of senators refuses to let that happen, the measure waits. The Senate's own overview of the practice calls the filibuster a loosely defined term for action designed to prolong debate and delay or prevent a vote (senate.gov).
How a filibuster works today
The movie version, one senator talking through the night, still happens now and then. Most filibusters are quieter. A senator or a party signals that it will not agree to end debate, the majority leader counts and finds fewer than 60 votes, and the bill either waits or gets pulled from the floor. Nobody has to hold the microphone for hours. Because of that, the clearest trace a filibuster leaves in the official record is a cloture vote, the motion that ends debate.
The 60-vote threshold
Breaking a filibuster on most legislation takes 60 of the Senate's 100 members. The number comes from Senate Rule XXII, adopted in 1917 and set at three-fifths of the full Senate in 1975; the Senate's overview of filibusters and cloture walks through that history. Nominations play by different rules. Since Senate rules changes in 2013 and 2017, ending debate on a nomination takes only a simple majority.
The filibuster in the 119th Congress
The threshold shows up plainly in this Congress's votes. On June 18, 2026, the Senate voted 84 to 8 to invoke cloture on H.R. 6644, a housing supply bill, clearing the 60-vote bar with room to spare; the bill then passed 85 to 5 four days later. Judicial nominations moved the same month on far thinner margins. Cloture on circuit court nominee Matthew A. Schwartz passed 52 to 45 on June 24, 2026: short of 60, but nominations only need a majority. The list below shows the newest cloture votes in the record, each one a fight over ending debate.
What the filibuster cannot block
Some Senate business moves by majority no matter what. Budget reconciliation bills run under a law that caps debate, which is why large tax and spending packages often avoid the 60-vote fight entirely. Nominations, as noted, now advance by majority. And the House has no filibuster at all: a House majority can cut off debate whenever it has the votes.
Recent votes to end a filibuster
8 roll calls shown, newest first. Each row links to the official record.
Common questions
A filibuster is a Senate tactic that blocks or delays a vote by extending debate. Senate rules place no overall time limit on debate, so a measure can stall until 60 senators vote to end the debate through a motion called cloture.
A senator, or a group of senators, refuses to let debate end. Today most filibusters are silent: the majority leader counts votes, sees fewer than 60, and either files a cloture motion or sets the measure aside. Marathon floor speeches are the exception, not the rule.
Sixty of the Senate's 100 members on most legislation. Ending debate on a nomination takes only a simple majority, under rules changes the Senate adopted in 2013 and 2017. The motion that ends debate is called cloture.