Although, it's possible there's more brain drain happening from Michigan in general. Living in CO I've met way more Michiganders (and Minnesotans and Wisconsinites) than Iowans. There's probably more disposable income and liberal tendencies that inspires younger people to leave here than Iowans.
For what its worth the 2nd largest university in Iowa had a Trump precinct on campus in 2016.And the largest university is also flooded by out of states so the 2nd one might be more representative
