The Democratic National Committee said that any virtual roll call to officially nominate President Joe Biden as the party's presidential nominee will not begin before Aug. 1, according to a Wednesday letter sent to delegates and obtained by NBC News. The decision rules out the possibility that a process designed to quickly nominate Biden would begin as soon as next week, which some Biden allies had pushed for. It also buys more time for Democrats on Capitol Hill to come together and ask Biden to step down from the ticket, as many Democratic lawmakers privately hope they will. The House and Senate are out of town this week, but return to Washington the week of July 22. "No matter what may be reported, our goal is not to fast-track," wrote Minnesota Gov. Tim Walz and Bishop Leah Daughtry, co-chairs of the DNC's rules com