“Given what the experts are saying, delegates may end up on a phone call” selecting their nominee, Bob Mulholland, a DNC member from California, said in a text message. “Push 1 for Sanders, push 2 for Biden, push 3 for Bloomberg and push 8 for Yang, etc.”

Still, Mulholland said of the convention’s prospects, “It is full speed ahead until a staffer yells ‘Iceberg.’”

The DNC's steady-as-she-goes posture stands in contrast to some of its own state parties. Wisconsin Democratic Party officials said they're busy trying to figure out all the digital tools they need to be virtual for their state convention in June, just a month before the national convention in the state.

Democrats could pursue a range of options if a traditional convention is not possible, including postponing the gathering or changing the rules to allow delegates to vote remotely.

If the convention had to be canceled, said Matt Bennett of the center-left group Third Way, the alternative could be relatively straightforward. Think video meetings, absentee voting and “a bunch of speeches that are televised from studios.”

But he said that even if Democratic Party officials were considering altering the convention, they could not hint at that until a decision is made, for fear of scaring off donors and other attendees.

“If the DNC even intimated that they’re not having a convention, then we’re not having a convention,” he said. “I think it’s truly up in the air.”