Final answer:
If the president vetoes a bill passed by Congress, the bill can still become a law if it is passed again by two-thirds of both houses of Congress.
Step-by-step explanation:
If the president vetoes a bill passed by Congress, the bill can still become a law if it is passed again by two-thirds of both houses of Congress. This process is called an override, and it allows Congress to bypass the president's veto. The requirement for a two-thirds majority ensures that the decision to override the veto has significant support.
Learn more about the process of veto override