The Filibuster Began as an Accident of an 1806 Senate Rules Cleanup

On March 2, 1805, the vice president of the United States stood before the Senate to say goodbye, and by contemporary accounts some of his listeners were moved to tears. This was remarkable, because the vice president was Aaron Burr, who the previous July had shot and killed Alexander Hamilton in a duel at Weehawken, New Jersey, and who had been indicted for it in two states. He had spent the winter presiding, with careful fairness, over the impeachment trial of Supreme Court Justice Samuel Chase. Now his term was ending, Thomas Jefferson had dropped him from the ticket, and he used his farewell to defend the Senate as a sanctuary of law and order. Somewhere in that speech, or in advice he gave the chamber around the same time, Burr made a far less dramatic suggestion that would outlive everything else he did. The Senate's rulebook, he said, was cluttered. Among the redundant provisions was a motion called the "previous question." The Senate rarely used it. It could go. The next year, the Senate took his advice. And with that tidy bit of housekeeping, it removed the only tool in its rules that let a simple majority end debate and force a vote. Nobody seems to have noticed what they had done for about thirty years.

In short: The Senate's 1806 rules revision dropped the "previous question" motion, apparently because it was seldom used, leaving no way for a majority to cut off debate. Filibusters emerged decades later, cloture was added in 1917, the threshold fell to sixty votes in 1975, and the practice became routine by the 2000s. The filibuster is a rule, not a constitutional principle, and the new Democratic Senate will have to decide what to do with it.

What the "previous question" was

The name is confusing, so it is worth slowing down. In parliamentary practice, the "previous question" is a motion that asks the body whether to vote now on the main question in front of it. If a majority agrees, debate stops and the vote happens. The House of Representatives kept the motion and still uses it today, which is one reason the House has never had a filibuster: a majority can always bring debate to an end.

The early Senate also had the motion in its rules, but used it rarely, and when it did, it was not clearly understood as a device for cutting off debate. Historians of Congress, including the political scientist Sarah Binder, who has studied the episode closely, have argued that the senators of 1806 were not making a deliberate choice to protect unlimited debate. They were trimming a rule they did not think they needed. The founders did not design the filibuster. They did not even design its absence. It arrived by subtraction.

The long silence, then the first filibusters

For decades after 1806, the gap made little practical difference. The Senate was small, its members largely observed informal norms, and long debate was usually an attempt to persuade, not to obstruct. Senators gave lengthy speeches, but the chamber eventually voted.

That began to change in the 1830s and 1840s as partisan conflict sharpened. Senators discovered that if no rule could end debate, a determined minority could simply keep talking, or keep making motions, until the majority gave up. Historians point to fights in that period, including a long Whig effort in 1841 to stop a bill on Senate printing and a battle over a national bank, as early cases in which a minority deliberately used delay to block a majority. The word "filibuster" itself, borrowed from a term for freebooters and pirates, attached to the practice later in the nineteenth century.

Through the rest of the 1800s, filibusters remained occasional, but they were real. Proposals to restore some way of ending debate came up repeatedly and failed, often because the senators voting on them could see themselves needing the weapon someday.

Woodrow Wilson and the "little group of willful men"

The first lasting limit came out of a crisis. In early 1917, with Germany resuming unrestricted submarine warfare, President Woodrow Wilson asked Congress for authority to arm American merchant ships. The House passed the bill overwhelmingly. In the Senate, a small group of senators, including Robert La Follette of Wisconsin and George Norris of Nebraska, opposed it as a step toward war and talked it to death as the session expired in March.

Wilson denounced them as "a little group of willful men" who had made the government helpless. The Senate, called back into special session, adopted Rule 22 on March 8, 1917. It allowed the Senate to end debate, a process called cloture, by a vote of two-thirds of senators present and voting.

The new rule was hard to use. Two-thirds was a high bar, and for decades cloture rarely succeeded. Its most consequential failures came on civil rights.

How the filibuster blocked civil rights

From the 1920s through the 1960s, Southern senators used the filibuster again and again to defeat or weaken civil rights legislation. Federal anti-lynching bills that had passed the House died in the Senate under the threat or reality of filibusters. Bills against the poll tax met the same fate. In 1957, Senator Strom Thurmond of South Carolina spoke for more than twenty-four hours against a civil rights bill, the longest individual speech in Senate history; the bill passed anyway, in a weakened form.

The 1964 Civil Rights Act broke the pattern only after a filibuster that lasted for weeks and consumed much of the spring. Its supporters, a bipartisan coalition that needed the votes of Republican leader Everett Dirksen and many of his members, finally won cloture in June 1964. It was the first time the Senate had ever invoked cloture on a civil rights bill. The Voting Rights Act followed in 1965.

That history is why many progressives see the filibuster less as a guardian of deliberation than as a tool that has historically protected the status quo, including some of the worst features of it. It is also why the strongest defenders of the rule today rarely mention the 1950s.

From talking to silent

For most of its history, a filibuster required senators to hold the floor, which was exhausting and visible. Two changes made it cheaper.

In the early 1970s, under Majority Leader Mike Mansfield, the Senate began using a "two-track" system that let other business proceed while a filibustered bill was set aside. That spared the chamber all-night sessions, but it also meant a minority could block a bill without anyone having to talk.

In 1975, the Senate lowered the cloture threshold for most matters from two-thirds of those present and voting to three-fifths of all senators duly chosen and sworn, which in a full Senate is sixty. The change made cloture easier to win. Combined with the two-track system, it also made the threat of a filibuster a routine feature of nearly every significant bill. By the 2000s and 2010s, the number of cloture motions filed each Congress had climbed steeply, and "it needs sixty votes" had become a standing assumption rather than a sign of extraordinary resistance.

How a filibuster actually works now

Because the modern filibuster rarely involves anyone talking, it helps to know what actually happens when a bill is "filibustered."

A bill usually has to clear two hurdles before a final vote: the motion to begin debating it, called the motion to proceed, and the bill itself. Either can be filibustered. When the majority leader expects opposition, the leader files a cloture petition signed by at least sixteen senators. Under Rule 22, the cloture vote then happens one hour after the Senate convenes on the second day after the petition is filed. If sixty senators vote yes, debate is limited; the rule allows up to thirty more hours of consideration before the final vote. If cloture fails, the bill is usually pulled and the Senate moves on.

Notice what that means in practice. The minority does not have to keep anyone on the floor. It only has to make sure that forty-one senators do not vote yes on cloture. The burden falls entirely on the majority to find sixty. And because each step can require its own cloture vote with waiting periods, even a bill that will eventually pass can consume a week or more of floor time. That cost alone discourages leaders from bringing up many bills, one reason the modern Senate passes so few.

The time cost also shapes what never comes up at all. Leaders count votes in advance; when sixty are not there, the bill is not scheduled. Much of the filibuster's effect is invisible, in legislation that never reaches the floor because everyone already knows how the cloture vote would go.

The carve-outs

The sixty-vote rule has never applied to everything. The 1974 Congressional Budget Act created the budget reconciliation process, which allows certain tax and spending bills to pass by simple majority under tight limits on what they can contain. Major laws, from tax cuts under presidents of both parties to parts of the Affordable Care Act and the Inflation Reduction Act, have passed that way.

Then came nominations. In November 2013, Senate Democrats led by Harry Reid changed the precedent so that cloture on executive nominations and lower-court judges required only a simple majority, after Republicans blocked a series of appointments. In April 2017, Senate Republicans led by Mitch McConnell extended the change to Supreme Court nominations to confirm Neil Gorsuch. Each side blamed the other for forcing its hand, and each had a point.

The legislative filibuster survived. In January 2022, Democrats tried to create an exception for voting rights legislation. The rules change failed, 48 votes to 52, when two Democratic senators, Joe Manchin of West Virginia and Kyrsten Sinema of Arizona, joined all Republicans in opposition.

The other side of the ledger

It would be unfair to tell the filibuster's story only through its worst chapters. The same rule that let Southern senators block civil rights bills has, at other moments, been used by senators of both parties to slow measures they considered dangerous or rushed, and to force changes to bills that eventually passed with broader support. Minority senators have used the threat of a filibuster to win amendments, hearings and time for public debate that a simple majority might not have granted.

Supporters of the rule also point out that many significant laws have passed with sixty or more votes when there was real cross-party agreement: infrastructure, veterans' health care, criminal justice reform in 2018 and responses to emergencies among them. The site's list of bills both parties passed together is a reminder that bipartisan bills do still pass. The question is not whether the filibuster has ever done anything useful. It is whether, on balance, a rule that lets forty-one senators block almost anything serves the country better than one that lets a majority govern and be held responsible for the results.

The best case for keeping it

Defenders of the filibuster, in both parties, make a serious argument. The Senate was designed to be the slower chamber, where a narrow majority cannot remake national policy on a party-line vote. Requiring sixty votes forces compromise, gives the minority a reason to negotiate, and protects against wild swings each time power changes hands. Many Democrats made exactly this case when Republicans held the Senate during Trump's first term and in 2025, when the president urged Senate Republicans to abolish the rule during a government shutdown and Republican leaders declined.

That last point deserves weight. The filibuster has blocked progressive priorities. It has also blocked things progressives opposed. Any majority considering abolishing it should ask what the other party would do with the same power.

My argument for the new majority

Here is my view, labelled as such. The filibuster is a rule, made by accident and reshaped by deliberate choices since. It is not in the Constitution, which requires supermajorities for specific things like treaties and veto overrides and conspicuously does not require one for ordinary laws. Treating it as sacred gets the history backwards.

At the same time, the strongest reform is not necessarily abolition. Several options lie in between: restoring the talking filibuster so obstruction carries a visible cost; carving out voting rights and election administration, as many Democrats proposed in 2022; lowering the threshold gradually over successive votes; or shifting the burden so that opponents must produce forty-one votes to keep debate going rather than supporters needing sixty to end it. Each has trade-offs, and each should be judged by whether the majority would be comfortable with the other party using it.

Democrats won the Senate in November 2026, and the new Congress is sworn in on January 3, 2027. Any rules change would need nearly every Democrat. A president who can veto bills changes the calculation too. What the new majority does is not settled, and anyone telling you it is already decided is guessing.

What you can do

• Ask your senators directly. Do they support changing the filibuster, and if so, how: a talking filibuster, a carve-out, or abolition? Find your representatives for phone numbers and contact forms.
• Watch how party members vote. The party unity page shows how often each Democrat votes with the party, and the common ground page lists bills both parties passed together.
• Follow the new majority. Our topic pages on Democrats in Congress and the new majority track what the incoming Congress takes up first.
• Check the votes yourself. The Congress votes page shows roll calls and bills as they move, including cloture votes.