Aside from the five major speeches from Mr. Biden, his wife, Jill Biden, Ms. Harris and the Obamas, the average length for remarks will be just two minutes, convention organizers said. Mr. Sanders will have an eight-minute time slot. He plans to speak live from Burlington, Vt., but will pre-record a version in case there are technical difficulties. Mr. Sanders and Ms. Obama are the headline speakers for the opening night…

For a community that has long suffered from an inferiority complex, winning the convention over cities like Miami and Houston had served to lift Milwaukee’s civic self-esteem. But now it is not hard to find local Democrats depressed about the lost chance to showcase their city for a national audience, and the vanished revenue that would have come from an influx of some 50,000 visitors.

Marc Dulberger, a local businessman who said he poured $30,000 into different ventures in anticipation of the big event this summer, said the combined loss of revenue from professional sports leagues and the convention had been a personal financial disaster.

“No Brewers, no Bucks, no convention,” Mr. Dulberger said. “It’s the ghost convention now.”