"A Brute in human form"

Before they joined forces to oppose secession during the Winter of 1860-81, Democrat Andrew Johnson and Whig William G. Brownlow had been "[b]itter antagonists for twenty years."

You've got to admit, political invective isn't as creative as it used to be:

In Browlow's eyes, Johnson had long been "contemptible political prostitute," an "unprincipled knave," and a "disgrace to patriotic Tennessee." Johnson reciprocated in kind, labeling the Whig politico and newspaper editor a "vile miscreant," a "brute in human form," and a hypocritical liar.

Daniel W. Crofts, Reluctant Confederates: Upper South Unionists in the Secession Crisis.