Conservative-baiting comedian Al Franken says he hopes the drug allegation against Rush Limbaugh isn't true, "but if it is, I'm looking forward to the perp walk." The author of "Rush Limbaugh is a Big Fat Idiot" said that should the talk-show host be arrested, he'll make sure to watch the spectacle on TV. "I'll be switching channels to get it from every angle," he said. "My favorite part is when they push their heads to get them down into the [police] car." Franken, who is on a book tour touting his latest conservative-blasting tome, "Lies and the Lying Liars who...