Once, Florida Gov. Ron DeSantis was Trump’s biggest rival. Now, his campaign is over – and Trump seems to be sailing to the Republican presidential nomination. How did DeSantis squander his lead? And if Trump’s nomination is preordained – what does that mean for the general election?  Guest: Ben Mathis-Lilley, Slate senior writerIf you enjoy this show, please consider signing up for Slate Plus. Slate Plus members get benefits like zero ads on any Slate podcast, bonus episodes of shows like Slow Burn and Dear Prudence—and you’ll be supporting the work we do here on What Next. Sign up now at slate.com/whatnextplus to help support our work. Learn more about your ad choices. Visit megaphone.fm/adchoices