Comedian and “Air America” radio host Al Franken was on NBC’s “Late Night with Conan O’Brien” last night, and took the opportunity to defame all three of America’s leading conservative media personalities. First, O’Brien set him up nicely by asking: “I’m curious. How do your books sell compared to say the books by you know, Rush Limbaugh or O’Reilly? The books from the right, 'cause I know those, those are popular books, too.” Franken’s response: “The books from the right do okay. Uh, Rush hasn’t had a book in a long time. I think he had a, uh, drug problem,...