How many votes are required in Congress to override a presidential veto?

To override a presidential veto, Congress must achieve a supermajority of two-thirds in both the House of Representatives and the Senate. This requirement is set forth in Article I, Section 7 of the Constitution, which outlines the legislative process and the president's role in it. The two-thirds threshold is designed to ensure that there is significant support for a measure, reflecting a strong consensus among lawmakers before a decision can be made to counteract the president's rejection of legislation. This high standard emphasizes the balance of power between the legislative and executive branches, ensuring that major legislative decisions cannot be easily overturned.