How can a presidential veto be overridden?

A presidential veto can be overridden by a two-thirds majority vote in both the House of Representatives and the Senate. This process is outlined in Article I, Section 7 of the Constitution, which stipulates that if the President disapproves of a bill, Congress can still pass the legislation if enough members in both chambers vote in favor of it.

For this to happen, the voting must achieve a two-thirds majority, which ensures that there is substantial support for the legislation, demonstrating a strong consensus that the bill should become law despite the President's objections. This high threshold reflects the significant power that a presidential veto holds and the importance of bipartisan agreement in overcoming it.

The other options do not align with the constitutional requirements. A simple majority in either chamber does not suffice for an override; unanimous consent agreements pertain to procedural matters rather than veto overrides; and while Congress can convene special sessions, this is unrelated to the process of overriding a veto.