Northwestern takes down Wisconsin 31-17, looks to seize Big Ten West

ESPN ran a graphic this week listing contenders to win the Big Ten. Michigan and Ohio State were at the top, of course. Then Wisconsin and Iowa. And then Purdue.

Not listed: Northwestern, even though NU entered the week atop the Big Ten West standings. If the Wildcats felt slighted, they channeled that into a strong performance against a bumbling Wisconsin…