What role does the president play in a bill becoming a la

A bill becomes a law when signed by the president. If the president vetoes a bill, Congress can override the veto by a two-thirds vote of both houses. There are many reasons for a president to reject legislation. For example, although the president may be supportive of the bill's main purpose, he may decide that it contains unacceptable riders.

the president has the power to pass or veto the law.