One source said before Harris joined there seemed to be an effort to stall, which they said is normal for events with high ranking officials. But what angered many donors, this source said, was that during the wait — which was about 20 minutes — donors were “admonished.” Participants of the call were told they needed to “lock in and get behind” Biden and to not pursue efforts to push out the president.

“Please help us turn down the volume on this conversation publicly,” Melissa Morales, founder and president of Somos Votantes, said on the call, according to a transcript obtained by NBC News. “It’s time to stop the leaks and the rampant rumors. Your message has been heard and received. But every day that we continue this publicly chaotic conversation, we come closer to a loss — no matter who the nominee is.”