A member of Congress introduces a bill into his or her legislative chamber. The president may sign the act of Congress into law, or he may veto it. Congress can then override the president's veto by a two-thirds vote of both the House and Senate thereby making the vetoed act a law.
Once congress agrees to the new law, it goes through the president. He decides where it is created or not. If he does not accept, it is vetoed. However, if 3/4 of Congress decides to pass the law after he vetoes it then it is passed.
