How can Congress override a President's veto?

To override a President's veto, Congress must achieve a two-thirds vote in both the House of Representatives and the Senate. This requirement is established by the U.S. Constitution, specifically in Article I, Section 7, which states that if the President vetoes a bill, it can still become law if two-thirds of both chambers of Congress vote to approve it. This high threshold is intended to ensure that a significant majority supports the legislation despite the President's objections, reflecting the principle of checks and balances within the U.S. government.

A simple majority in the House is insufficient because it does not meet the constitutional requirement to overturn a veto. Similarly, a three-fourths vote in both chambers exceeds what is necessary and is not the correct threshold. Furthermore, a unanimous vote from all members is not only impractical but is far more than what is mandated. Achieving a two-thirds majority is a notable legislative challenge, as it requires a greater consensus than usual legislation, reinforcing the significance of the presidential veto power in the legislative process.