Surgeons removed a small blood clot above his left eye. With McCain away, unless one of those two senators changes their mind, Senate Republican leaders are unlikely to meet the 50-vote threshold needed to begin debate on the bill.
McConnell believes the least reliable Republican vote in the Senate is crucial to passage of health care reform?
It would likely fail without Mr McCain's vote.
A half-dozen key senators, including McCain, were undecided on whether to go ahead with a procedural vote, putting the bill's future in serious jeopardy before McConnell punted.
With the vote scheduled for next week, which was postponed for an indefinite period, GOP's success in Obama's promised abolition is growing more and more uncertain, despite the recent lobbying of the Trump administration.More news: Bihar crisis: Nitish, Lalu call separate meetings with lawmakers
Senate Majority Leader Mitch McConnellMitch McConnellCBO won't have Monday score for Senate healthcare bill After delay, Senate Republicans struggle not to let healthcare stall Health Secretary Price: More people will be covered under GOP bill than are now covered MORE (R-Ky.) announced Saturday night that Senate consideration of legislation repealing and replacing ObamaCare will be delayed while Sen. Democrats are unanimously opposed to the bill, as are the nation's major medical groups and insurers.
"I believe as soon as we have a full contingent of senators, that we'll have that vote", he said. "The BCRA will make health care less available or affordable, especially for our most vulnerable Idahoans: Our children, the elderly, and those with pre-existing conditions".
The newest version attempts to attract conservative support by allowing insurers to offer skimpy plans alongside more robust ones, but also reaches out to moderates by adding billions in help for the opioid crisis and to defray high costs for consumers.
Pathology reports on the clot were expected in the next several days.
His office released a statement saying McCain, 80, is resting at his home.
The senator's office said in its statement that "on the advice of his doctors, Senator McCain will be recovering in Arizona next week".