Marquette is obviously an outlier up to now, but they are also more respected. MU was among the first to show RoJo pulling ahead of the dearly departed, flawless god of campaign finance law, Russel Dana Feingold. They're a good pollster and to dismiss this poll because it's not what you want to see is the definition of ostriching.
There's a chance (obviously) that Walker hangs on, but at the moment, Evers seems to have a lead between 2 and 5 points. His lead could grow. It could evaporate. Toss up with a slight D tilt is appropriate here.
If Marquette is an Outlier the NBC/Marist is an even bigger one.