I actually have a theory on why Nate Silver is dragging his feet-
or we get to the point where he (Trump) has zero chance of winning
This is what I believe will happen this election cycle. I don't see this race tightening dramatically, due to Trump's ineptness and lack of leadership on two of the major issues on American voters minds, the pandemic and race relations. Trump is trump is trump. In other words, he won't suddenly become an inspirational leader in the coming months, which is what it would take to win back voters. Nah, it's not too early to say, Trump doubled down on dumb and got burned. I mean the Quinnipiac poll a few days ago had Biden with a 15 point lead. FIFTEEN! Other recent quality polls have Biden with at least a double digit lead. Trump will become the first sitting president since George HW Bush in 1992 to fail to be re-elected, with a combination of repeatedly shooting himself in the foot and generally showing a lack of leadership on the major issues of the day. This isn't something that can shift dramatically over the next three and a half months. Not to mention, early voting will be HUGE this year and MANY MANY votes will be locked in long before election day, some states begin a month and a half out. This race will shift very little moving forward, and what little shift is left will continue to be gains by Biden.