This is a blank flowchart that shows how a bill becomes a law. A bill becomes law when it is passed by both Houses of Congress and signed by the president. This can be a difficult process due to the numerous steps involved. When a bill is introduced in one house, it must go through its committees and then be voted on by that house before being sent to the other house for consideration. If both houses pass the bill, it is sent to the President, who can either accept or veto it.