That's certainly true but I doubt it will fall 3.5% in one election especially when Trump is supposed to energize this portion of the electorate. Also turnout among non college whites is already massively reduced vs college educated whites. In 2012 it was 55% of the white vote vs over 67% in the white general population.
The whole election probably depends on whether Trump can turnout an unusually high number of non-college whites. If the proportion falls at all from 2012 I doubt it will even be close.
That's true, but I frequently wonder if non-college whites will have a big surge this year. Trump has no real GOTV effort to get these people to the polls, and the RNC's game is not
that strong and is tasked with turning out voters for downticket races, so not necessarily focusing on entirely on what Trump needs. Another issue I see is that for the same reason these voters are getting energized, Trump is also triggering an opposing reaction from minority voters, which will help cancel out some of the non-college white surge.
It also might be possible that the craziness of this election might have only staved off an inevitable drop in turnout across the board, and thus may have stabilized the non-college white numbers.. but, I also think there are more problems with this little theory.
We'll see. I just think Trump's lack of a ground game is going to cost him in the end. Where he might have been able to fuel a bigger surge, now he will have to settle for whatever reality gives him.