 If Biden were to withdraw before the Democrats' national nominating convention in August, it would raise the prospect of an open convention where delegates would be free to back a new nominee. According to the Democratic National Committee's rules, if Biden were to withdraw after the convention, then the DNC would choose the party's presidential ticket. Erin Rael, NBC News Radio. Keeping you connected with the church and the world 24 hours a day and on the web at relevantradio.com. I'm Glenn Leverins, and this is listener-supported Relevant Radio.