The President and Congress
are first introduced as "bills" in the two bodies of Congress.
A bill has to be approved by both the House and the Senate through
a series of votes and debates. Once Congress has approved a bill,
it is sent to the president, who heads the Executive Branch. The
president has several options about what to do with a bill. He may
sign it into law, send it back to Congress to be changed, or veto
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