A reader, DMFraser from Toronto, put it this way:

He has tapped into a national anger and is riding an anti-establishment wave that doesn’t recognize any boundaries, let alone political party boundaries. This is a U.S. national version of what happened with Mayor Rob Ford in Toronto. A combination of “in your face” politics and a traditionally low voter turnout created the ideal situation for activating just enough politically unengaged people who were “mad and didn’t want to take it anymore” to swing the race in Ford’s favor — in a traditionally moderate-to-left-of-center city. Trump is bringing millions of new voters who feel excluded and angry.

(A columnist for The Globe and Mail in Toronto warned Americans of how things could play out.)

What about religion? Massachusetts is one of the more secular states, and that helps Trump here and in other Northeastern states like New Jersey and Vermont. The only state he has lost, Iowa, had a very large evangelical presence, although he seems to have turned the corner with evangelicals since.

One of Mr. Trump’s worst states is Utah, which ranks highest in church attendance, according to a Gallup study last year. Massachusetts ranks fourth from the bottom. Fellow New England states Vermont, New Hampshire and Maine make up the bottom four.

Isn’t Massachusetts one of the best-educated states? And shouldn’t that hurt Trump? You would think so. According to polling, it’s generally true that the more education people have, the less likely they are to support him.

Or as Mr. Trump put it last week, “I love the poorly educated!”

In particular, Mr. Trump doesn’t do as well among people with postgraduate degrees, but most people with postgraduate degrees are Democrats, not Republicans.

A national Pew study last year noted that Democrats lead by 22 points (57 percent to 35 percent) in party identification among adults with postgraduate degrees. This pattern held true in a comparison of the exit polls in the 2008 Massachusetts primary races: In the Democratic race, 33 percent of voters had done postgraduate study, and in the Republican one, 23 percent had.

Still, plenty of well-educated, white-collar Republican voters in Massachusetts support Mr. Trump. Perhaps an establishment candidate can close the gap in the final hours, but Marco Rubio and John Kasich are splitting those votes.

Mr. Trump has performed well among those who are responsive to religious, social and racial intolerance. A progressive state like Massachusetts ought to score high on tolerance. Does that check out?