How a bill becomes law
The same gauntlet twice, once per chamber, then the President. Most bills never clear the first gate, and that is the system working as designed: the Constitution makes lawmaking deliberately hard.
Every federal law started as an idea someone convinced a member of Congress to carry. What follows is the full path from idea to the United States CodeThe subject-organized compilation of general and permanent federal law, arranged in titles. Where a statute lives after enactment, as opposed to how it was passed.Read the full definition (opens a new tab), including the exits, the places where a bill can quietly die, which is where the overwhelming majority do. Follow any live bill in the app and you can place it on this map.
An idea becomes a draft
Bill ideas come from everywhere: members and their staff, the White House, agencies, advocacy groups, constituents. But the Constitution gives the pen to Congress alone, so every draft needs a member of the House or Senate willing to sponsor it.
Professional drafters in each chamberOne of the two houses of a legislature. Congress has two: the House of Representatives and the Senate. A bill must pass both, in identical text.Read the full definition (opens a new tab)'s Office of Legislative Counsel turn policy into statuteA law passed by a legislature and signed into effect. Distinct from a regulation, which an agency writes, and from a court decision, which interprets both.Read the full definition (opens a new tab) text. Colleagues who sign on before introduction become original cosponsors, an early gauge of support.
Introduction
In the House, the sponsor literally drops the signed bill into the hopperThe wooden box at the front of the House chamber where representatives physically drop new bills to introduce them.Read the full definition (opens a new tab), a wooden box at the rostrum. In the Senate, it is presented from the floor or handed to a clerk. The bill gets its number, H.R. or S. plus a sequence, and that number follows it everywhere.
Numbering restarts with each two-year Congress, which is why H.R. 1 exists in every Congress: leadership reserves the low numbers for its priorities.
Referral to committee
The bill is routed to the committee (sometimes several) with jurisdictionA court's legal authority to hear a case: over the subject matter, the parties, and the territory.Read the full definition (opens a new tab) over its subject: tax bills to Ways and Means, farm bills to Agriculture. referralThe assignment of a newly introduced measure to the committee (or committees) with jurisdiction over its subject.Read the full definition (opens a new tab) is clerical in form and fateful in practice, because the receiving committee controls what happens next.
Committee: hearings & markup
This is where bills live or die. The committee can hold hearings, rewrite the text line by line in a markupA committee session where members amend a measure line by line and vote on whether to report it to the full chamber.Read the full definition (opens a new tab), and vote to report it to the full chamber. Or, for most bills, it can simply do nothing, and the bill expires with the Congress.
A committee report accompanies reported bills, explaining intent, and is later mined by courts and agencies for what Congress meant.
The House floor
Before a major bill hits the House floor, the Rules CommitteeThe House committee that writes the terms of debate, the 'rule', for each major bill: how long debate runs and which amendments are allowed.Read the full definition (opens a new tab) writes its 'rule': how long debate runs and which amendments are allowed, sometimes none. Debate happens, amendments (if permitted) are voted, and passage takes a majorityMore than half. A plurality is only the largest share, which can be far less than half when more than two candidates run.Read the full definition (opens a new tab) of those voting.
Uncontroversial bills skip all this via suspension of the rulesA House fast track for uncontroversial bills: 40 minutes of debate, no amendments, and a two-thirds vote to pass.Read the full definition (opens a new tab): 40 minutes of debate, no amendments, supermajorityAny threshold above half: three-fifths for Senate cloture, two-thirds to override a veto or convict on impeachment, three-fourths of states to ratify an amendment.Read the full definition (opens a new tab) to pass. Most bills that pass the House pass this way.
The Senate floor
The Senate normally proceeds by unanimous consentDoing business by universal agreement instead of votes. Most Senate floor action happens this way, which is why a single objecting senator has real power.Read the full definition (opens a new tab), so a single senator's objection forces the long road: a motion to proceed, debate without time limit, and clotureThe Senate's only procedure for ending debate over objection. Most legislation needs 60 votes; nominations need a simple majority.Read the full definition (opens a new tab), 60 votes, to cut debate off. This is the filibusterExtended debate used to block a Senate vote. Because most measures need 60 votes to cut off debate, a determined minority can stop legislation that has majority support.Read the full definition (opens a new tab) in practice, and it is why most contested legislation needs 60 supporters, not 51.
Budget budget resolutionCongress's annual fiscal blueprint: total spending and revenue targets. It never goes to the President and never becomes law, but it can unlock reconciliation.Read the full definition (opens a new tab) is the exception: fiscal measures meeting strict rules pass with a bare majority, which is why so much major policy travels inside them.
The whole gauntlet again
Passing one chamber wins nothing but a ticket to the other, where the bill faces referral, committee, and floor all over again. The second chamber can pass it unchanged, amend it, substitute its own version wholesale, or ignore it entirely.
Resolving the differences
The Constitution demands one identical text. The chambers get there either by bouncing the bill back and forth with amendments ('engrossed amendmentAn amendment adopted by one chamber and prepared in its official form, sent to the other chamber for concurrence. The ping-pong stage of lawmaking.Read the full definition (opens a new tab)') until one side accepts, or by appointing a conference committeeA temporary House-Senate panel that negotiates one compromise text when the chambers pass different versions of a measure.Read the full definition (opens a new tab) to negotiate a compromise both chambers then approve without further amendment.
Formal conferences have grown rare; modern big bills are usually pre-negotiated by leadership and ping-ponged. Either way, each chamber must pass the final text.
The President's desk
The enrolled billThe single final text passed identically by both chambers, printed on parchment, signed by chamber officers, and presented to the President.Read the full definition (opens a new tab), parchment, signed by the Speaker and the Senate's presiding officer, goes to the White House, and a ten-day clock (Sundays excepted) starts. Sign it: law. Veto it: back to Congress with objections. Do nothing: law without a signature if Congress is in session, dead if Congress has adjourned, the pocket vetoIf Congress adjourns during the President's 10-day window so the bill cannot be returned, presidential inaction kills it instead of enacting it, and there is nothing to override.Read the full definition (opens a new tab), which cannot be overridden.
The override attempt
A vetoed bill returns to its originating chamber, and both chambers must repass it by two-thirds, on recorded votes, for it to become law over the President's objection. The bar is high on purpose: historically only about one veto in twenty is overridden.
Source: U.S. Senate, Vetoes by President
Law, and onto the books
The new law receives a public lawWhat a bill becomes when enacted, numbered by Congress and order of enactment: Public Law 119-4 is the 4th law of the 119th Congress.Read the full definition (opens a new tab) number (Public Law 119-XX: Congress, then sequence), is published immediately as a slip lawThe first official publication of a new law: a single pamphlet issued right after enactment, before it appears in the Statutes at Large or the Code.Read the full definition (opens a new tab), bound chronologically into the Statutes at LargeThe official chronological record of every law Congress has enacted, printed exactly as passed. The legal authority when it conflicts with the U.S. Code.Read the full definition (opens a new tab), and finally woven by subject into the United States CodeThe subject-organized compilation of general and permanent federal law, arranged in titles. Where a statute lives after enactment, as opposed to how it was passed.Read the full definition (opens a new tab). From here, execution belongs to the executive branchThe branch that carries out the law: the President, the Cabinet departments, the agencies, and the roughly two million civilian employees who do the work.Read the full definition (opens a new tab), and interpretation, when disputes come, to judiciaryThe branch of government made up of the courts and judges. The federal judiciary is the Supreme Court plus the courts Congress created beneath it.Read the full definition (opens a new tab).
Source: GovInfo, Public and Private Laws
- Congress.gov, How Our Laws Are Made
- House.gov, The Legislative Process
- U.S. Senate, About Filibusters and Cloture
Stage-specific sources are cited on their stages above.