Purely anecdotal and just one person, but I was talking to a higher up before a conference call started at work. He’s a Michigan grad and a donor. I jokingly said, yeah, there’s rumors your school might go after my school’s coach if they get rid of Harbaugh. He said Campbell is a good coach, but he and his friends he talks with that are donors still like Harbaugh and think the price tag too buy him out right now isn’t worth what they’d get in return with a coaching change. Said if Harbaugh decides to leave on his own, no one would hold him back, but there isn’t much of an appetite (amongst his group of friends at least) to pay for a buyout.
Again, PURELY anecdotal.
Edit: he also specifically talked about Campbell not being a Michigan Man.
Not that it matters in these searches but go look at Twitter at national media’s tweets about Campbell to Michigan and see how many UM fans REALLY don’t want Campbell.