This poll doesn’t mean Biden is going to lose, but if this is accurate (read: if), Biden probably isn’t winning MI/PA/WI in a landslide, and his win might be more modest than some think.
I mean, campaigns have been saying all along that it's a tighter race than publicly projected. The only people who ever thought Biden was winning MI/PA/WI easily were on Twitter; I promise you no voters on the ground or organizers on the ground have ever believed this. This one poll proves nothing except that Biden is probably still leading by 8/9 points nationally and we have a slight outlier from IA showing Trump+7 when it's probably Trump+3 or something.
