Hill Harper is joining a crowded field of candidates seeking the Democratic nomination inMichiganfor an openU.S.
Slotkin raised $5.8 million in just over four months, according to the AP.
In 2012, Obama appointed Harper to a presidential cancer panel.

Hill HarperGetty Images
He also is the author of other books includingLetters to a Young BrotherandLetters to a Young Sister.
He also is the founder of the Manifest Your Destiny Foundation.
Melissa Gilbert announced a bid for a Michigan congressional seat in 2016, butdropped out for medical reasons.

Harper has been emphasizing other experience before his on-screen career.
He wrote on Twitter, Im a union organizer.
Im a single dad.
Im a small business owner.
And, yes, Im an actor.
But heres what Im NOT: A career politician.