Mr. Gillum, who lost his race for Florida governor, had previously been shadowed by an F.B.I. inquiry into city government in Tallahassee, where he was mayor.
Joe Biden’s campaign is challenging the political muscle of the Democratic Party’s left wing, which is desperate for a nominee who embraces its policy goals.
Amid criticism of the special counsel’s investigation, President Trump offers an extraordinary admission, that the rival country helped him win the presidency in 2016.
Robert S. Mueller III stated clearly that he hoped his public statement Wednesday would be his last, but with impeachment fever rising, Democrats want him on a witness stand.