Eminem is used to being the headlining act, but he'll be the opener at Kamala Harris' campaign rally tonight in Detroit ... where he's set to introduce none other than former President Barack Obama.
Eminem All Business Introducing Barack Obama at Kamala Harris Rally, Obama Raps | TMZ Live
Eminem kept it all business opening up for Barack Obama at a Kamala Harris event in Michigan ... but Barack Obama was so loose, he..
TMZ
