DNC letter says virtual roll call to nominate Biden will happen in August CBS NewsD.N.C. Slows Biden’s Nomination as Party Discontent Persists The New York TimesDemocrats aim to nominate Biden in early August, as some push him to exit race Voice of America – VOA NewsDNC moves forward with Biden virtual roll call despite furious backlash from some Democrats CNNDemocratic rift over Biden candidacy deepens even as party says he will be nominee The Guardian US