Probably just me, but I think Slotkin should consider dropping out and running for reelection instead.
If Harper runs a progressive enough campaign, she will lose the primary, as black voters+progressives is enough to win the primary.
Not a chance. He’ll be lucky to crack 10% in the primary.
A point I've made before is there's this bizarre mindset that Democrats are just as obsessed with celebrity candidates as Republicans are when with the obvious exception of Al Franken, it's very difficult to come up with any examples of them nominating one. If we include professional athletes you could count Heath Shuler although that was now quite awhile ago, and currently Colin Allred, but he was nominated largely on his legal work and work with the Obama Administration instead of his sports career (he didn't even play for a team popular in the area he represents.) After that the only example I can think of is John Hall who played in some B-tier yacht rock band that was mildly popular in the 70s and served two terms as very generic D backbencher in the House from 2007-2011. I'm sure if you dug hard enough you could find something like a State Senator somewhere who was on a reality TV show like 15 years ago, but regardless the point is clear.
The guy who played Steven from Breaking Bad is a county commissioner in Bernalillo County, New Mexico if you really want to scrape the bottom of the barrel for examples of Democratic/liberal celebrities running for office.