Twitter poll: Which unit faces biggest test?

If you're on Twitter, you can vote in our ongoing series of Big Ten Twitter polls for our weekday TV show #BTNLive weekdays at 6 p.m. ET. On tonight's #BTNLive show, our experts discuss this question: Which unit has the toughest matchup Saturday? The choices: #NorthwesternDefense, #UWDefense, #IUOffense, #PSUOffense or #PurdueDefense

Select your choice below and tweet out your vote. We'll be tabulating the hashtag totals all day and throughout the show. The hashtags are: 

• #NorthwesternDefense
• #UWDefense
• #IUOffense
• #PSUOffense
• #PurdueDefense