John McCain has officially come out against the Graham-Cassidy Obamacare repeal bill.

Will other Republicans follow his lead?

The so-called Maverick may have just slayed his best bud Lindsey Graham's healthcare bill.

Arizona Senator John McCain has announced that he cannot "in good conscience" vote for the Graham-Cassidy ObamaCare repeal bill - saying in a statement that he could not support it without a CBO score.

"I cannot in good conscience vote for the Graham-Cassidy proposal. I believe we could do better working together, Republicans and Democrats, and have not yet really tried. Nor could I support it without knowing how much it will cost, how it will affect insurance premiums, and how many people will be helped or hurt by it. Without a full CBO score, which won’t be available by the end of the month, we won’t have reliable answers to any of those questions."

In that same statement, McCain urged bipartisanship - and said he would consider voting for the bill if it were brought up as part of "regular order" and not part of the budget reconciliation process Republicans are using to force it through Congress with a simple majority and zero public hearings.

If just one more Republican comes out against this bill it's dead.

So will it fail?

Or will they bribe more senators like they're trying to bribe Lisa Murkowski and get them to stay on board?

Graham-Cassidy is now hanging like a thread, who'll be the next Republican to cut it loose?