Pennsylvania’s got a U.S. Senate seat up for grabs, and the primary is shaping up to be a showdown between moderate, establishment candidates and those on the fringes of each party.  Guest: Jonathan Tamari, national political writer for the Philadelphia Inquirer.  If 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