The event is planned for Tuesday, when Barack Obama speaks in Chicago, and the campaign hopes to hold it at the arena where Republicans held their convention, people briefed on the planning said.
It is not unusual for presidential candidates to hold events away from the convention in the lead-up to the speeches accepting their party’s nomination. In 2012, Mr. Obama did not arrive at the Democratic convention in Charlotte, N.C., until the day before he delivered remarks. In 2016, Hillary Clinton arrived at the convention in Philadelphia the day before her speech; she was first seen onstage when she thanked Mr. Obama for his remarks vouching for her on the Wednesday before she spoke.
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