What is required for Congress to override a Presidential veto?

For Congress to successfully override a Presidential veto, it must achieve a two-thirds majority in both the House of Representatives and the Senate. This requirement ensures that there is substantial bipartisan support for the legislation, reflecting a significant level of agreement among lawmakers against the President's decision to veto a bill.

The rationale behind this two-thirds requirement stems from the balance of power intended by the framers of the Constitution. By setting the threshold high, it prevents the legislative branch from easily overriding executive decisions, thus maintaining a check on congressional power and encouraging cooperation and consensus.

A simple majority in both houses would be insufficient, as it does not demonstrate the necessary level of support to counteract the President's authority. Similarly, a three-fourths majority is not typically required for veto overrides, as this standard is related to constitutional amendments rather than legislative processes. Likewise, a unanimous vote in both houses is unrealistic and unattainable in practical governance, making it an impractical choice for overriding a veto.