For proof, go here and scroll down to the Daily Show video titled: "Doris Kearns Goodwin: Jon summons Doris Kearns Goodwin to help settle a score with John Bolton."
(Sweet summary: JB was on the Daily Show Monday night, and was his usual pushy, sanctimonious, know-it-all self. In particular, he argued with Jon Stewart about the members of Abraham Lincoln's war cabinet. (Actually, "argued" might be too polite, considering that what Bolton did was turn purple and shout "Wrong. That's wrong.") Well, the jokes on Bolton, and for once it isn't about his stupid mustache, as the video reveals.)