can you override a veto
The pocket veto is an absolute veto that cannot be overridden. The veto becomes effective when the President fails to sign a bill after Congress has adjourned and is unable to override the veto.
By Robert Longley. A presidential veto is the rejection of a bill passed by the majority votes of both the House of Representatives and the Senate. While Congress can vote to override a presidential veto, causing the bill to become law without the president's approval, this is rarely done. More often than not, the threat of presidential veto is sufficient motivation for Congress to modify the bill prior to its final passage.