Who signs bills to become laws?

The President is the individual who signs bills into law. According to the U.S. Constitution, after a bill is passed by both the House of Representatives and the Senate, it is sent to the President. The President then has the authority to approve the bill by signing it, at which point it officially becomes law. This process underscores the President's role in the legislative process as the head of the executive branch, acting as a check on the legislative powers of Congress.

The Vice President does play a significant role in the legislative process, particularly as the President of the Senate, but does not have the authority to sign bills into law. Similarly, while the Speaker of the House and the Senate Majority Leader have important roles in managing legislative proceedings and ensuring party discipline, they do not possess the power to sign bills; that responsibility rests solely with the President.