Congressional scales. A true balance' A satire on President Zachary Taylor's attempts to balance Southern and Northern interests on the question of slavery in 1850. Taylor stands atop a pair of scales, with a weight in each hand; the weight on the left reads "Wilmot Proviso" and the one on the right "Southern Rights." Below, the scales are evenly balanced, with several members of Congress, including Henry Clay in the tray on the left, and others, among them Lewis Cass and John Calhoun, on the right.