Who has the power to veto bills?

The power to veto bills is primarily held by the President of the United States. This authority is established in Article I, Section 7 of the U.S. Constitution, which grants the President the ability to reject legislation passed by Congress. When a bill is presented to the President, they can either sign it into law or veto it, which means they refuse to approve it. A vetoed bill can still become law if Congress re-passes it with a two-thirds majority in both the House of Representatives and the Senate, thereby overriding the President's decision.

In contrast, the Senate and the House of Representatives, while they have important legislative roles in creating and passing laws, do not have the authority to veto bills. Similarly, the Supreme Court has the power to interpret laws and the Constitution but does not possess any legislative or vetoing powers. Thus, the President is the only entity among the given choices that can directly veto legislation.