The Democratic National Committee is forging ahead with a virtual roll call to pick the party’s presidential nominee, even as a steady stream of congressional Democrats called for Joe Biden to exit the race.

Minnesota Gov. Tim Walz and Leah Daughtry, co-chairs of the committee, along with DNC staff, argued that the virtual roll call vote is necessary to prevent any potential Republican-backed legal challenges for ballot access in Ohio. Former White House counsel Dana Remus, who is advising the DNC on the issue, called the virtual roll call the “wisest, most prudent course,” otherwise it would “[leave] the door open to a potential legal challenge and that’s a risk.”

“How significant of a risk? Well, it’s hard to say,” Remus said. “People certainly disagree, and reasonably disagree — but it is a risk, and if we can avoid it, we should.”