John Calhoun, if you secede from my nation I will secede your head from the rest of your body.

However, Mark R. Cheatham, director of The Papers of Maritin Van Buren, reports that there is no original source verifying Jackson ever said this: Mark R. Cheatham, "Are These Andrew Jackson Quotes Accurate?" Jacksonian America: Society, Personality, and Politics (February 21, 2022)