Most people are not aware that Romney got more votes in Wisconsin in 2012 than Trump got in 2016.
Bottom Line - Obama got core Democrat voters to the polls in Wisconsin, Michigan, and Pennsylvania.
Hillary Clinton did not.
And maybe you’re not aware when all the sudden done Trump actually did get more votes than Romney in Wisconsin with a way stronger third-party taking a hundred thousand votes as well.
https://www.politico.com/2016-election/results/map/president/wisconsin/