 He's the nominee of the Democratic Party and leader of the free world. Up next, one week from the GOP convention in Milwaukee, we'll take you inside the security preparation and speak with the director of the Secret Service. This week's Powerhouse Roundtable includes former Democratic National Committee Chair Donna Brazile, Senior Editor of the Dispatch Sarah Isger, USA Today Washington Bureau Chief Susan Page, and Washington Post congressional reporter Mariana Sotomayor. And this week from ABC News continues now on C-SPAN Radio.