According to Ballotpedia, Republicans have held this seat since at least 1991.
Ryan’s friends flee as frustration with Trump grows. (Politico, 10/19/2017)
That’s part of what drove Republican Rep. Dave Trott to announce he'd head back to Michigan once his current term ends. Trott stood up at a late July House Republican Conference meeting to complain that the White House was so distracted by the scandal enveloping Anthony Scaramucci at the time that Trump failed to help the Senate pass its Obamacare repeal bill.
Six weeks later, after the health care repeal collapsed in the upper chamber, Trott announced his retirement.
Trott will retires are 2 terms in the House. He was first elected in 2014.
Michigan's art of the gerrymander
Ohio Republican Patrick Tiberi is retiring from Congress but don't expect Democrats to flip this seat. (10/22/2017)