How can Congress override a presidential veto?

Congress can override a presidential veto through a two-thirds vote in both houses, which includes the House of Representatives and the Senate. A veto occurs when the president does not approve a bill passed by Congress, and this action is a check on legislative power to ensure that the president has the authority to reject legislation that he or she believes is not in the best interest of the country.

To successfully override a veto, a significant consensus is required, thus the two-thirds majority threshold is set to ensure that there is substantial legislative support for the bill despite the president's objection. This requirement helps maintain the balance of power between the legislative and executive branches, reflecting that overriding a presidential decision should not be taken lightly and requires broad agreement among elected representatives.

Other options do not align with the constitutional process for overriding a veto. A simple majority vote would not suffice, as the Constitution specifies the need for a two-thirds majority to enact this override. Unanimous consent is a procedural agreement often used for other legislative actions but does not apply to overriding vetoes. An executive order is a directive issued by the president and does not pertain to legislative processes, making it irrelevant in the context of veto overruling.