The Senate approved a bill Thursday that would gut much of the Affordable Care Act, marking the first time both chambers of Congress have voted to repeal President Obama's signature health care law since it became law five years ago.

The bill passed by 52-47 but will not head to the president's desk yet. While the House approved a similar repeal measure, the Senate amended it, which will require the House to vote on the bill passed Thursday by the Senate.

While the House is likely to pass the Senate's version, the legislation will never become law.

President Obama has promised to veto the bill, and Republicans lack a supermajority required to override his veto. But passage is a significant messaging victory for the GOP, which has been promising for years that they would send Obama a bill that repeals the law.

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