What can a president do to a bill a law

Before a bill is passed, the President can state his objection to it. He can threaten to veto it if it is passed. If the vote for the bill is expected to be close, just the threat of a veto may kill it.

the president has 4 options when signing a bill which are :1) To sign it - becomes a law 2) To veto it - refuse to sign it, must be returned to original house with a veto message 3) To allow the bill to become a law without signing - not acting on it for 10 days 4) Pocket Veto - If congress adjours its session within 10 days of submitting and the president does not act, the measure dies.

If a bill has passed in both the U.S. House of Representatives and the U.S. Senate and has been approved by the President, or if a presidential veto has been overridden, the bill becomes a law and is enforced by the government.