Biden Calls Trump’s Attack on Electoral Process ‘Totally Irresponsible’

“We can’t wait,” he said, calling the coming vaccine distribution “one of the greatest operational challenges we will have faced as a nation.”

“There is no excuse not to share the data and let us begin to plan,” Mr. Biden said.

Asked by a reporter who he would nominate to be his Treasury secretary, Mr. Biden said, “You’ll soon hear my choice for Treasury.” He added that the announcement would come “either just before or just after Thanksgiving.”

Earlier, Mr. Biden and Vice President-elect Kamala Harris, who joined him in Wilmington, met virtually with the governors from both parties. The group included John Carney of Delaware, Andrew M. Cuomo of New York, Michelle Lujan Grisham of New Mexico, Jared Polis of Colorado and Gretchen Whitmer of Michigan, all Democrats, as well as Charlie Baker of Massachusetts, Gary R. Herbert of Utah, Larry Hogan of Maryland, Asa Hutchinson of Arkansas and Kay Ivey of Alabama, all Republicans.

“You need help,” Mr. Biden told the governors as reporters were briefly allowed to listen. “I want you to know I will be your partner in the White House.”

Stopping the pandemic, Mr. Biden said later in his remarks, will require cooperation with governors and local officials.

“No national shutdown. No national shut down,” Mr. Biden said, forcefully denying an accusation that Mr. Trump repeated again and again during the campaign. “There’s no circumstance I can see which would require a total national shutdown.”

But he said the rapid spread of the virus across the country would require coordinated action, including a nationwide agreement to mandate that people wear masks and a decision by the federal government to help localities pay for the significant costs of confronting the disease, something that has so far left the Congress deeply divided and unable to cooperate.