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The power of the President to refuse to approve a bill or joint resolution and thus prevent its enactment into law is the veto. The President has ten days (excluding Sundays) to sign a bill passed by Congress. A regular veto occurs when the President returns the legislation to the house in which it originated, usually with a message explaining the rationale for the veto.  This veto can be overridden only by a two-thirds vote in both the Senate and the House. If this occurs, the bill becomes law over the President's objections. A pocket veto occurs when Congress adjourns during the ten-day period. The President cannot return the bill to Congress. The President's decision not to sign the legislation is a pocket veto and Congress does not have the opportunity to override.


Reports on Vetoes

Veto Override Procedure in the House and Senate  (pdf)

Regular Vetoes and Pocket Vetoes: An Overview  (pdf)

Look Up Presidential Vetoes

These publications provide histories for presidential vetoes, including whether Congress overrode the veto.

Summary of Bills Vetoed, 1789-present

Presidential Vetoes, 1989-2000 (pdf)

Presidential Vetoes, 1789-1988 (pdf)

The Line Item Veto?

The Line Item Veto Act, P.L. 104-130, allowed the President, within five days (excluding Sundays) after signing a bill, to cancel in whole three types of revenue provisions within the bill. The cancellation would take effect upon receipt by Congress of a special message from the President. Congress could "override" the line-item veto by enacting a disapproval bill that would make the cancellation message null and void. On June 25, 1998, the U.S. Supreme Court held the Line Item Veto Act unconstitutional.