Samejamesbond:
Is he trying to mock former Canadian Prime Minister Jean Chretien?
(I am only kidding. Jean holds his mouth that way due to a stroke he suffered, which stole his control of muscles in his face. The picture is kind of similar, though.)
Seriously,
I won't say what it looks like McCain is about to do to Barack because there are kids here -
hi kids! - but really -
AAAAGGGGGHHHHH!
It's just plain WRONG!