Book excerpt: "Toussaint's Clause: The Founding Fathers and the Haitian Revolution narrates the intricate history of one of America's early foreign policy balancing acts. Supporters of Toussaint's rebellion at first engineered a bold policy of intervention in favor of the rebels. But Southern slaveholders eyed the revolution with fear and eventually obtained a reversal of the policy - even while taking advantage of the rebellion to make the fateful Louisiana Purchase."--Jacket.