I listen to talk radio pretty much non-stop during the election season, and here in western Michigan Trump actually visited today for the first time in a month but I haven't heard one ad on the radio this week for Trump, let alone one ad on the radio in any other week in the last 30 days.
He's not going to win Michigan that way. Not without the western counties that all went for Ted Cruz. By eschewing the radio waves here Trump shows me he's not serious about winning Michigan. He keeps asking for money, but never seems to spend it on the one thing which could spread the enthusiasm present at his rallies to the older Republican base.
I think Trump will lose Michigan and simply wasted his time coming here today, mistakenly continuing to practice what's been appropriate to the primary strategy when the general election requires something more.
Clinton's Real Clear Politics polling average tonight in Michigan is +6.3.