Who has the power to approve or veto laws and what article and section?

In the United States, the President has the power to approve or veto laws. This authority is outlined in Article I, Section 7 of the U.S. Constitution. Specifically, it states that after a bill is passed by both houses of Congress, it is presented to the President, who can either sign it into law or veto it. If the President vetoes a bill, Congress can override the veto with a two-thirds majority in both houses.