Nothing positive about this. However, two quick notes.
McCain is 80 years old. It is very unlikely he will live through another full term. Like almost all Democrats, he will die in office, clinging to his desk until they pry it from his cold dead hands, you know, just like the founding fathers intended.
Also, McCain is the definition of a spineless bootlicker. He cares only about himself above all other things. Therefore he runs to kiss the ass of anyone who has power. He does not care the least little bit who that may be.
If Hillary wins, he will LOVE Hillary.
If Trump wins, he will LOVE Trump.
He personally does not care one way or the other as long as he continues to ride the gravy train and gets what he can from whomever wins.
The point is that if Trump wins, this jerkoff will give Trump no resistance because he never give anyone any resistance. That is his thing. He just slides along, gathering money from anywhere or anyone he can along the way. Democrat or Republican is nothing to him. He makes his living by making no waves at all about anything. McCain will be one less thing Donny has to deal with. So, at least there is that.
If Hillary wins, there will no longer be a government in the way that we understand government. Congress and McCain both will be meaningless, so it won't matter anyway.