Either 1). Trump is trying to shame McCain into voting yes, or 2). He got to him, and the fix is in

[Miles Archer]

Donald J. Trump ‏Verified account
@realDonaldTrump

So great that John McCain is coming back to vote. Brave - American hero! Thank you John.
3:44 AM - 25 Jul 2017

Link to tweet

[smirkymonkey]

1. Fuck you, Trump!

And fuck you McCain if you vote yes. You can burn in hell for all I care.

[Not Ruth]

2. McCain is a Russian asset

[tonyt53]

3. John McCain has been good at saying one thing, then voting the opposite way.

He is still a Republican.

[Clarity2]

4. There's a part of me

that thinks McCain is going to blow the bill up and vote no.

He's a terminally ill man barring a miracle treatment. What does he have to lose? He's not beholden to voters anymore.
He may have seen the "light" after having a brain tumor, and having to vote on a health care bill that would take away
the care he has just been given.

It would actually be astounding to me if he voted yes. This is maybe his last chance to stick it to Trump too. Go down in a blaze of glory and be seen a hero by the 90% of voters who don't want the ACA repealed.

There's this other part of me that sees how Megan McCain is fully on the Trump train, and none of it makes any sense. She seemed to be a moderate republican in the past. There's no saneness to her being on board with him - especially not after how Trump dissed her father.

Anyway, if he votes yes, he's dirt to me.

[standingtall]

5. McCain will vote to repeal the wishful thinking that he will vote no is a total fantasy

No matter how upset he is with Trump he is still more bitter towards Obama for beating him in the 08 election. Also there is no such thing as a moderate republican in 2017.