The Democratic National Committee (DNC) said the decision was made to protect Milwaukee residents as well as the vast number of people needed to stage a national convention.
The event will feature two hours of prime-time programming each night with feeds from around the country, the DNC said.
“From the very beginning of this pandemic, we put the health and safety of the American people first,” DNC Chairman Tom Perez said in a statement.
The Republican convention was initially set for Charlotte, North Carolina, before Trump moved part of the festivities to Jacksonville, Florida, after North Carolina’s governor warned he might not permit a huge crowd.
But a surge of coronavirus cases in Florida prompted Trump to cancel those plans. Only one night of the convention, a “nomination night,” will take place in Charlotte, Trump said in an interview on Fox News on Wednesday.
Trump said the bulk of the convention would be virtual and include live speeches from different locations, including his address on Aug. 27. (Reporting by Joseph Ax and Doina Chiacu; Editing by Colleen Jenkins)