The Democratic Party began the formal vote to nominate Vice President Kamala Harris for president on Thursday, kicking off a virtual roll call that will cement her status as the party’s standard-bearer heading into November.

The Democratic National Committee opened the vote to the delegates who will decide the party’s nominee at 9 a.m. Delegates are emailed a personalized and watermarked form, and they can either send the form back or have the DNC call them to cast their vote. Ballots are being sent on a rolling basis, and the process is expected to take several days, with the voting window closing at 6 p.m. on Aug. 5.

The DNC said it will share the full results of the roll call after it is completed, but it’s unclear whether they will make an announcement when Harris passes the threshold needed to secure a majority of 1,976 delegates.