I'm so glad you said that about McCain. I saw him twice during the debate cycle in the 2000 election. When the camera isn't on him, he's got a weird look on his face that I can't even describe. Angry. He's got major, major mental health problems, imo.
I saw him up close at a speech in 2000 - he went off on being Luke Skywalker - destined to fight the Empire...
He went on and on - really made the crowed go quiet and wonder what on earth we were seeing..