Not just an end-stage event — the mere threat of a veto shapes bills long before they ever reach the President’s desk.
A veto is the President’s formal refusal to sign a bill Congress has passed. Members of Congress often change text or abandon proposals entirely if they believe a veto is likely and an override unlikely — the threat does real work before any bill is even finished.
A veto threat can shape negotiations long before a bill reaches the President.
Guide to Government
Two Kinds of Veto
Returned to Congress, with objections
The President returns the bill to Congress with formal written objections — Congress can then attempt to override it.
A quieter, unappealable rejection
If Congress adjourns and the President simply doesn’t sign within the constitutional window, the bill dies without a formal veto message — and critically, without any override option available, since Congress isn’t in session to attempt one.
How Congress Can Respond
Two-thirds of both chambers, not a simple majority
Congress can override a regular veto with a two-thirds vote in both the House and the Senate — a real, difficult threshold requiring support well beyond the bill’s original passing majority. When an override isn’t realistic, lawmakers often rewrite the bill, attach pieces to other legislation, or wait for a different political moment entirely.
A pocket veto can’t be overridden at all
A common misconception is that every presidential veto works the same way and can always be challenged with an override vote. A pocket veto specifically can’t be overridden, because it only happens when Congress has already adjourned and isn’t in session to attempt one — a real, structural difference from a regular veto that makes timing, not just the President’s decision, a genuinely important factor in how a bill’s fate plays out.
