What majority is required in Congress to override a presidential veto?

In order to override a presidential veto, a two-thirds majority in both the House of Representatives and the Senate is required. This high threshold is set to ensure that a significant consensus exists among lawmakers before they can overturn a decision made by the President. The Founding Fathers designed this requirement to maintain a balance of power between the executive and legislative branches. Achieving a two-thirds majority indicates that there is substantial legislative support for the measure, even in the face of presidential opposition.

The other majority options do not apply in this context. A simple majority would not be sufficient to demonstrate the necessary consensus to override a veto, while a three-fourths or four-fifths majority exceeds the requirements set forth in the Constitution, which specifically calls for a two-thirds majority for such actions.