This episode of Whistlestop travels to March 4, 2019 when Senator Rand Paul quoted from Montesquieu on Twitter: “When the legislative and executive powers are united in the same person or in the same body of magistrates, there can be no liberty.” A statement that helped guide the founders towards a valuable separation of power.Whistlestop is Slate's podcast about presidential history. Hosted by Political Gabfest host John Dickerson, each installment will revisit memorable moments from America's presidential carnival.Love Slate podcasts? Listen longer with Slate Plus! Members get bonus segments, ad-free versions, exclusive podcasts and more. Start your two-week free trial at slate.com/podcastplus.Email: whistlestop@slate.com. Podcast production by Jocelyn Frank. Research by Brian Rosenwald and Elizabeth Hinson. Learn more about your ad choices. Visit megaphone.fm/adchoices