JUMPING THE PIGYou’ve heard the expression “jumping the shark.” Has McCain “jumped the pig”?Don’t miss it: http://www.msnbc.msn.com/id/3036677/#26649024http://en.wikipedia.org/wiki/Jumping_the_sharkJumping the shark is a colloquialism used by U.S. TV critics and fans to denote that point in a TV show or movie series' history where the plot veers off into ridiculous story lines or