What is required for Congress to override a Presidential veto?

To override a Presidential veto, it is necessary for both houses of Congress—the House of Representatives and the Senate—to achieve a two-thirds majority vote. This requirement is established in Article I, Section 7 of the U.S. Constitution, which details the legislative process and the checks and balances between branches of government.

The significance of the two-thirds vote reflects the intention of the framers of the Constitution to ensure that overriding a veto is not a decision made lightly or by a simple majority. This high threshold requires substantial agreement among lawmakers, thus promoting a system of checks and balances that prevents any single branch of government from having unchecked power.

Achieving a unanimous vote is impractical in a diverse legislative body, where varying interests and opinions are commonplace. Additionally, a simple majority in just one house would not suffice, as both chambers must agree for the override to take place. Lastly, the involvement of the Supreme Court is not necessary in the legislative process concerning veto overrides, as this is strictly a function of Congress. Overall, achieving a two-thirds majority in both houses of Congress is essential for successfully overriding a Presidential veto.