Today Baris did the in-depth analysis of the crowdfunded PA poll, he has Biden +2.4%. But Trump has some very strong indicators in his favor. Baris notes that Biden is underperforming where Hillary was at the same time, and PA broke extremely late for Trump in 2016, within the last 1-2 weeks of the race.
If FL is secure then PA becomes the linchpin of the race. Every other path for Trump depends on a flip, like MN or NH or NV, plus a shaky-looking MI hold. I like what Trump's doing with the schedule; after the Wu Flu diagnosis he can't afford to try and run up the numbers. He needs to fight for PA and MI, go for the MN flip, and maybe invest a day in NH trying for a payoff there.
Biden is fighting for PA heavily as well. These FL visits seem like tokens, there's probably behind-the-scenes organizing going on trying to get ballot shenanigans going in Broward again.
But neither side seems to be taking MI too seriously. Trump has a visit coming up, but he isn't hitting it hard, and Biden's ground game was reported as being invisible there. So I'll extend the Biden shenanigans theory to MI as well; he's counting on the governor to deliver the state by hook or by outright crook. Maybe Trump assumes it's too much of an uphill battle to overcome the margin of fraud, so he isn't spending the most resources there. But he can win FL over that margin, so he's solidifying it.