Sen. John McCain

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Arizona's new senator says he'd vote to repeal the nation's health care law. That's one additional Republican ready to obliterate the statute because his predecessor, the late Sen. John McCain, helped derail the party's drive with his fabled thumbs-down vote last year.

Updated at 3:36 p.m. ET

Sen. John McCain may, once again, be the savior of President Barack Obama's signature domestic achievement.

The Arizona Republican announced in a statement on Friday that he opposes the latest GOP legislation to dismantle the Affordable Care Act.

Sen. John McCain (R-Ariz.), who interrupted brain cancer treatment to return to Capitol Hill and advance the health law repeal efforts, cast the dramatic and decisive “no” vote in the early morning hours that upended the Republican effort to repeal the Affordable Care Act.