Veto laws work by giving an executive the power to reject a bill passed by the legislature, sending it back with objections and forcing lawmakers to either revise it or muster a supermajority to override. At the federal level, the rules come from Article I, Section 7 of the Constitution, and out of roughly 2,600 presidential vetoes in American history, Congress has overridden only about 112.1U.S. Senate. Vetoes, 1789 to Present State governors operate under their own constitutions and often hold veto tools the President does not.
What Happens When a Bill Reaches the President
Every bill that clears both the House and the Senate must be delivered to the President before it can become law. This requirement comes from the Presentment Clause in Article I, Section 7, Clause 2.2Constitution Annotated. Article I Section 7 Clause 2 No matter how lopsided the vote in Congress, the bill lands on the President’s desk.
From there, the President has three options. Sign the bill and it becomes law. Return it unsigned, with written objections, to the chamber that originated it. Or do nothing, and let the ten-day clock run.
The written objections are not optional. The Constitution requires the originating chamber to record them in its journal, giving lawmakers and the public a clear account of why the President rejected the bill.2Constitution Annotated. Article I Section 7 Clause 2
The Regular Veto
A regular veto happens when the President returns a bill with objections within ten days of receiving it, not counting Sundays. The bill goes back to its chamber of origin, and it dies there unless Congress acts to override.3Constitution Annotated. ArtI.S7.C2.2 Veto Power
If the President neither signs nor returns the bill within ten days while Congress remains in session, the bill becomes law automatically. That default rule keeps the executive from killing legislation through silence while lawmakers are still available to respond. In practice, presidents almost always take an explicit position.
The Pocket Veto
The pocket veto works differently. If Congress adjourns before the ten-day window expires and the President has not signed the bill, the bill dies. With no chamber in session to receive it back, the President’s silence becomes a permanent rejection.3Constitution Annotated. ArtI.S7.C2.2 Veto Power
The critical difference: a pocket veto cannot be overridden. Congress has no procedural path to force the bill into law once the session ends. This shapes strategy at the tail end of every congressional session. Bills that reach the White House in the final days risk being killed by silence alone, so lawmakers who want a signature push to deliver bills early enough to preserve their override option.
Pocket vetoes during short mid-session breaks have been a source of dispute. Congress now routinely designates the Clerk of the House and the Secretary of the Senate to accept veto messages while lawmakers are away, and the practical effect is that vetoes during intrasession recesses are treated as regular vetoes rather than pocket vetoes.
How Congress Overrides a Veto
Congress can enact a bill over the President’s objection, but the threshold is steep. Both chambers must vote to override by a two-thirds supermajority.4Constitution Annotated. Constitution Annotated Each votes independently, and if either falls short, the veto stands and the bill dies for that session.
The override vote is a roll call, with each member’s vote recorded by name in the journal.5Legal Information Institute. The Veto Power The Supreme Court has clarified that “two-thirds” means two-thirds of a quorum in each chamber, not two-thirds of the full membership. Since a quorum is a simple majority, vacancies and absences can shift the math slightly in Congress’s favor.
Even so, overrides are rare. About 4 percent of all presidential vetoes have been overridden.1U.S. Senate. Vetoes, 1789 to Present The veto threat alone often reshapes bills long before they reach the President, because sponsors know they are unlikely to assemble a supermajority after the fact.
What Congress Can Pass Without the President
Not every action Congress takes is subject to a veto. The Constitution requires that “every order, resolution, or vote” needing agreement of both chambers be presented to the President, but several categories fall outside that rule.6Legal Information Institute. Presentation of Senate or House Resolutions
- Joint resolutions proposing constitutional amendments do not require a presidential signature. The Supreme Court confirmed in 1798 that the President has no role in the amendment process.7U.S. Senate. Types of Legislation
- Concurrent resolutions pass both chambers but carry no force of law. Congress uses them for internal matters like setting a budget framework or scheduling adjournment.7U.S. Senate. Types of Legislation
- Simple resolutions apply to just one chamber, governing internal rules or expressing nonbinding views. Neither the other chamber nor the President is involved.
The dividing line is whether the action has the force of law. If it does, the Presentment Clause applies. If it is internal to Congress or proposes a constitutional amendment, the President stays out of it.
Why There Is No Federal Line-Item Veto
A line-item veto lets an executive strike individual spending provisions while signing the rest of a bill into law. Governors in 44 states hold some form of this power, but the President does not.
Congress tried to create one. The Line Item Veto Act of 1996 gave the President authority to cancel individual spending items and limited tax benefits after signing a bill into law. President Clinton used the power 82 times before the Supreme Court struck the statute down in 1998.
In Clinton v. City of New York, the Court held that the Act violated the Presentment Clause. Canceling parts of a signed law amounts to amending or repealing legislation, and that power belongs to Congress. Under the Presentment Clause, the President can sign a bill or return it in full, but there is “no constitutional authorization for the President to amend or repeal.”8Justia Law. Clinton v City of New York, 524 US 417 (1998) A constitutional return happens before enactment and covers the whole bill; the line-item cancellation happened after enactment and affected only pieces. That gap made the Act unconstitutional.
The decision means any federal line-item veto would now require a constitutional amendment, not a statute.
How State Veto Powers Differ
State constitutions give governors veto tools that go well beyond the federal model. The differences show up in the types of vetoes available, the deadlines to act, and the votes needed to override.
Amendatory and Reduction Vetoes
About seven states give their governor an amendatory veto, which lets the executive return a bill with specific recommended changes rather than a flat rejection. The legislature then votes on whether to accept the revisions. If both chambers agree, the amended bill goes back for a signature. If they disagree, some states send the bill to a conference committee. The governor generally cannot return the bill for amendments a second time.
Around thirteen states allow a reduction veto, letting the governor lower a specific dollar amount in an appropriations bill without eliminating the line entirely. Instead of striking a $50 million highway allocation, a governor with this power could cut it to $30 million.
Signing Deadlines
The federal ten-day window is only one approach. State deadlines range from as few as three days during a legislative session to as many as 60 calendar days. Many states set a separate, longer deadline for bills presented after the legislature adjourns, sometimes 30, 45, or 60 days. The consequence of inaction also varies: in some states, an unsigned bill becomes law by default; in others, it dies.
Override Thresholds
At the federal level, two-thirds is the only path. States vary more. Most require two-thirds, but at least six allow an override with a simple majority of elected members. A handful set the threshold at three-fifths. Alaska requires a three-fourths vote for revenue and appropriations bills. A governor’s veto therefore carries very different weight depending on the state.
Why the Veto Threat Matters Before Any Bill Is Vetoed
The formal veto draws the headlines, but the threat of one often does the real work. When a president or governor signals opposition, sponsors typically negotiate changes rather than risk a rejection they cannot override. The 4 percent federal override rate reflects both the difficulty of the process and the reality that many bills are quietly revised or abandoned long before they reach the executive.1U.S. Senate. Vetoes, 1789 to Present
The dynamic runs both ways. A legislature with a veto-proof majority can push through bills the executive opposes, and the executive knows it. In that situation, a veto is closer to a public protest than a real barrier. Veto law sets the structure; party alignment, electoral timing, and the political cost of an override vote determine how aggressively either side uses it.