Talk about your sources of clean energy: Al Franken has been letting the gas out of pompous politicians and the silver-tongued sycophants who suck up to them since Gerald Ford stumbled into the presidency. If you were wondering whether "Rush Limbaugh Is a Big, Fat Idiot," the title of Franken's 1996 best-seller left little doubt where Al stands on the matter. His 2003 political field day, "Lies and the Lying Liars Who Tell Them," and his 2005 President Bush-whacking followup, "The Truth (With Jokes)," gained him serious attention as an astute liberal watchdog whose wonky team of researchers, TeamFranken, gets...