Don't confront McCain in any manner
Whatever you do.
Leave John McCain alone. Don't speak to him, don't look at him, nor do anything to anger him.
He is a very easily disturbed person, known to launch into obscene tirades against those who don't agree with him on the conservative side of the aisle.
John Cornyn learned not to question him, Chuck Grassley learned not to do it, and poor old 92 year old Strom Thurmond almost got his ass kicked just due to questioning one of McCains ideas.
Do not...Repeat, do not anger John McCain.
He is fond of saying he likes to "reach across the aisle" to the Democrats. However, if you are pro life, pro 2nd Amendment, pro anything he donsn't like, he is likely to "reach across the aisle" and knock the living shit out of you, and anyone with you.
When it comes to "idealogical struggle" he is quite combatative with conservatives who want American soveriegnty.
Please be very, very careful and do not rile him when you go.
He will soon be President, and God only knows what he'd do with that kind of power when he gets in office.