Tevi Troy writes for Politico about infighting within the Republican Party and its likely long-term impact.

One of the most spectacular fissures of this already dramatic political season has been the messy, public divorce of the Republican intelligentsia from the party’s suddenly energized populist voter base. As Donald Trump grips crowds and racks up delegates with a blunt nationalist message of jobs, protectionism and “winning,” true-believing conservatives—from dean of the conservative commentariat George Will, to Pete Wehner, who has worked for every GOP administration since Ronald Reagan, to Weekly Standard editor Bill Kristol—have peeled off in anti-Trump directions. When National Review, the flagship magazine of modern conservative thinking, devoted an entire issue to rejecting the GOP front-runner, it felt like a separation being finalized. Trump, of course, was unfazed, saying, “You have people that are in National Review—they’re eggheads. They’re just eggheads.”

It’s easy to lay the blame at Donald Trump’s feet (after all, it’s hard to imagine another Republican candidate of the last four decades rejecting National Review so cavalierly), but this year’s split between intellectuals and the rank-and-file GOP goes beyond the front-runner. In fact, neither of Trump’s remaining rivals, Ted Cruz nor John Kasich, is particularly cozy with the conservative intelligentsia. (Think tankers tended to coalesce behind Scott Walker, Jeb Bush and Marco Rubio, who are long since out of the race.) What’s really going on is that the ideas that the conservative intellectual community has been peddling for decades have failed to appeal to an angry blue-collar voter base. What worked in Reagan’s era just doesn’t work anymore, and Trump is simply exploiting the divide.

If this divide deepens, it would mark the end of a romance between conservative intellectuals and the voters who propel their candidates into office that goes back several decades—one that has helped the GOP to win seven out of 10 the presidential elections, from Richard Nixon’s first term to George W. Bush’s 2nd. Conservative intellectuals helped build the GOP’s basic modern platform—low taxes, small government, fewer regulations, toughness on crime, and traditional values—and, more deeply, helped the party craft its image as the “party of ideas,” the one whose policy goals have largely defined the American conversation since Reagan’s presidency.