I think things run deeper than we’ll ever know. I suspect Trump knows of things McCain has pulled over the past several months to undercut Trump and his agenda. McCain flew as staffer to London to pick up the fake dossier. Instead of giving it to Trump he gives it to the FBI. Fact is, they already had it.
Then you have him showing up in the AM to nix the Obama care repeal vote.
I’m sure there are other things, that only Trump knows about.
One thought. Who leaked the story that Trump vetoed a different tribute to McCain, or did Trump want that spread?
Yes, McCain worked his last two years focused almost solely on undermining Trump - I think that is obvious.