Numbers numbers numbers... but ignoring why GOPers usually do better in LV screens - and why they weren't reliable in 2012, they have a tendency to screen out Dem voters like first-time voters, itinerant voters, those who aren't confident in English.
Likely voters of course tend to be older, whiter, better educated, and more stable in residence. Such usually favors Republicans, and "likely voters" well modeled the 2010 and 2014 midterm elections which rarely create enthusiasm to bring new voters to the polls.
This time, educated white voters aren't so Republican-leaning as usual, at least in the Presidential election. There is no demographic I would rather have as my voters than well-educated white voters. Minorities? They are called "minorities" for good reason, and in relatively few states are they the majority. They are less amenable to cranky appeals of demagogues; they are more likely to hold their ground in an informal debate with less-educated (and less-informed) white voters.
So someone with the assertive ignorance of "Archie Bunker" tells an educated person that he is voting for Donald Trump because he will "Make America Great Again". Just imagine the possible retorts... "for whom?' ...'what's so bad about Barack Obama?'... etc.
