A band of House Democrats is seeking to halt the Democratic National Committee from quickly coronating Joe Biden as the party’s presidential nominee before the August convention, warning that it could be seen as quashing the raging debate over whether Biden should stay at the top of the ticket.

More than 20 Democrats have signed onto a draft letter, obtained by NBC News, calling on the DNC to pump the brakes on holding a “virtual roll call” formally nominating Biden in a process that could start as soon as Sunday. The DNC initially had planned to do the virtual roll call ahead of the Chicago convention to address challenges of getting Biden on the Ohio ballot, but state lawmakers have since pushed the ballot deadline until after the convention.