WASHINGTON (AP) — John McCain seemed poised to be the savior of the GOP health bill when he returned to the Capitol despite a brain cancer diagnosis.

He turned out to be the executioner.

The longtime Arizona senator stunned pretty much everyone Friday by turning on his party and his president and joining two other GOP senators in voting "no" on the Republicans' final effort to repeal "Obamacare."

That killed the bill. And it also dealt what looks like a death blow to the Republican Party's years of promises to get rid of Barack Obama's health law, pledges that helped the GOP win control of the...