It should be noted Morning Consult had Trump approval at 44% in October of 2018 and the exit poll found it at 48%, they underestimated his approval rating by 4% in WI, I assume they are using the same methodology here.
That's really not too damning of an underestimate, especially given that it's at minimum several days dated by the time election day rolled around. For comparison, Fox News polling had Trump's approval among likely voters at 52% in late October 2018.
Which Fox poll in WI had Trump approval at 52% in WI, do you have a link to the poll.
