And that brings us to the big lesson the GOP should take from the entire Trump affair: There is another side to the Republican Party, one that the GOP has tried to ignore, and can ignore no longer. It’s a side of the party that has learned to distrust its leaders on immigration, to be suspicious of a turbo-charged capitalism that threatens their way of life. And it may be a side of the party that is needed to return the GOP to presidential victories. It is the forgotten part of the Nixon-Reagan coalition. And by being ignored, it has turned angrier and more toxic…

These are the voters who hate modern, tight-suited, Democratic-style liberalism not because it offends God, but because it is “killing” the America they knew. It threatens their jobs with globalization and immigration. They hate tassle-loafered right-wingers who flippantly tell them to get retrained in computers at age 58, and warn that Medicare might be cut. They built their lives around promises that have been broken and revoked over the past two decades. Trump looks like their savior. Someone who can’t be bought by the people who downsized them. Or at least, he is their revenge…

Republicans need to understand this not just to repair their coalition, but to head off Trump in the here and now. Flying banners over his rallies that say, “Trump will raise your taxes” is counterproductive. His supporters correctly perceive the burden of higher taxes will likely fall on those who already have more than they do. Similarly, all the attacks on Trump’s cronyism, or his relationships with Democrats, will fail as well. His supporters are weakly attached to the Republican Party. They won’t blame him for being the same way.

Trump’s candidacy is teaching the GOP that it has to deliver for voters who feel economic insecurity. If they don’t, the radical middle will rise not just to embarrass them, but to wound them as well.