"The President might not sign the bill, however. If he specifically rejects
the bill, called a veto, the bill returns to Congress. There it is voted on
again, and if both houses of Congress pass the bill again, but this time by a
two-thirds majority, then the bill becomes law without the President’s
signature. This is called “overriding a veto,” and is difficult to do because
of the two-thirds majority requirement."
