" In particular, three slaveowning politicians loom large in our narrative as principal enablers of the territorial expansion of slavery and, consequently, of the slave-breeding industry: Thomas Jefferson, Andrew Jackson, and James K. Polk—a Virginian and two Tennesseans. All three were slaveholders, and like all slaveholders, their wealth was primarily stored in the form of captive human beings, so their entire financial base—personal, familial, social, and political—depended on "

― Ned Sublette , The American Slave Coast: A History of the Slave-Breeding Industry