Why not? Other entertainers have been in public office. Jesse Ventura, Al Franken, Jane Hathaway from the Beverley Hillbillies, Gopher from the Love Boat, Sonny Bono, Arnold Schwenegger , this is just off the top of my head. I'm sure there are more.
And don't forget President Reagan was an actor before he was a president. Yay!
He might be good. Who knows? He might be horrible. I don't know his music so I don't have an opinion of him.
Btw, I am just naming names here. I'm not talking about these peoples political views.