Honestly, I hate to say it, but that was my first thought when I heard the game was canceled. Well, there's the final nail in Trump's coffin in Wisconsin.
That poll was conducted before that was public. +17 seems a bit high to me but having the Wisconsin health care system on the verge of collapse coupled with Wisconsin's Big 10 championship chances likely being ruined by the virus while at the same time the President declares victory over it isn't going to sit well with them.