Although he can croon through watered down doo-wop tunes easily enough, former president Bill Clinton also displays a surprising capacity for grit when he delivers a soul-grinding rendition of "Heard it Through The Grapevine" ("Read It In the Headlines"). He even throws a greasy bone to his delta roots with a hearty "Whitewater Blues." And that's just in the first collection of political humorist Paul Shanklin's parodies, a key staple—and one of the wittiest weapons—of the Rush Limbaugh Show since 1993. Shanklin scored the job when he phoned Limbaugh's producer as Bill Clinton and said, "I don't feel Rush and...