Top Biden Advisers Preview Fall Election Strategy

“We’re very comfortable and confident that we will, as long as people are following the rules in each state and they cast their vote, that those votes will be counted,” Ms. O’Malley Dillon said, noting that typically not “every single vote” is counted on election night. “There are big states that will be called on election night. And there will be a significant amount of the vote that will be called on election night. So at the end of the day, I think that for us, our job is to make sure we get the most votes.”

She cited Arizona as one state with a record of successful, extensive vote-by-mail practices.

As part of its fall effort, after months of virtual campaigning, the Democratic ticket will more consistently travel to battleground states while still being mindful of safety precautions, officials said. Activities will include retail campaigning, remarks and round tables, with an eye on early vote windows, the officials said.

Ms. Harris is expected in Wisconsin on Labor Day, and Mr. Biden is slated to go to Michigan and Pennsylvania next week.

Ms. O’Malley Dillon ran through a slide show highlighting details on fund-raising and staff statistics. She also noted efforts to engage key constituencies state-by-state and over all.

The “strategic imperatives” listed on one slide for Pennsylvania, for instance, included “turn out the base in Philly” and “hold gains among non-college educated white voters.”

The presentation also discussed core Biden constituencies — including Latino voters, Black voters, young people and women — and cited opportunities with disaffected voters, independents, suburbanites and the traditionally more conservative older voters.

Kate Bedingfield, a deputy campaign manager for Mr. Biden, said in response to a question that Mr. Biden was being tested weekly for the coronavirus. Earlier Friday at a news conference Mr. Biden confirmed that he had been tested.