For more than a half century, David Levine has taken on the most powerful men of the free world with only his pen and a bottle of India ink. That pen has proved to be mightier than the sword as Levine skewered, illuminated, satirized and condemned every president of the 20th century, as well as the most significant presidents from colonial times and the Civil War era. His drawing of Lyndon Johnson revealing a scar in the shape of Vietnam is considered...