What is one way this bill could still become a law?

If the president vetoes a bill, Congress can override the veto if two-thirds of the members in each house vote to pass it. The bill then becomes law without the president’s signature, so the correct choice is “Each house of Congress can pass the bill with a two-thirds majority.” A simple majority is not enough to override a veto, and the Speaker cannot sign in the president’s place.

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