From the story here:
There were no surveys released this year from Wisconsin that showed Trump with a lead.
Clinton held a 6.5 point lead in the Badger State heading into Election Day, and the state was not even discussed as on par with Michigan or Pennsylvania as a potential blue state pick-up for Trump.
Trump’s victory in Wisconsin — a state that has not gone for the GOP nominee since 1984 — helped him seal the deal.
In Michigan and Pennsylvania, deep blue states the GOP candidate has not won in decades, polls showed the race tightening in the home stretch, but only one poll, from Trafalgar Group, showed Trump with the lead.