538 has a YouGov poll with WI at 47% Hillary and 49% Bernie. She could pull it out. [View all]
Hillary has been doing some hard work in WI, and her performance at the WI Founders Dinner was BETTER than Bernie's. For the most part, Bernie did his usual stump speech of broad themes. Hillary was MUCH more TARGETED in her remarks, talking A LOT about Wisconsin in particular and the issues important to that state including how she is working to help ALL candidates there. She has also been getting some good newspaper endorsements.
The only reason I think Bernie is doing well in the polls in WI is that it is a god damned open primary. (I don't like those because I believe that PARTY MEMBERS ONLY should choose their candidates, and people can vote strategically and throw off the results.
One recent poll has her ahead, and this one has her gaining back ground, and, if this trend continues into the end game, she could squeak it out. This will be all about TURNOUT. It's all within the margin of error. If Bernie wins it, I bet it is by a small amount and they essentially split the delegates.
So c'mon folks in WI. GOTV GOTV GOTV !!!