How many more of these do we need? We already know the Democrats will easily carry Michigan after Trump's fluke in 2016. Michigan polls are known for their accuracy after all.
Early polls aren’t always predictive, but I think you’re really overestimating Trump here. Polling wasn’t off by 11 points in 2016 (not even close) and it was relatively accurate in 2018. I don’t disagree that MI is winnable for him, but unlike Obama in 2012, he really has zero margin for error, and even that’s being generous to him considering that he only won it by 10,000 votes against a
very flawed candidate the first time he ran.