Mr. Trump has abandoned most of the core principles that have defined Republicans for the past century. Free trade abandoned for protectionism. Challenging our adversaries and promoting democracy replaced by coddling Russia and cozying up to dictators near and far. Fiscal conservatism replaced by reckless spending and exploding deficits.

What’s left of the party is a rigid adherence to tax cuts, a social agenda that repels most younger Americans and rampant xenophobia and race-based politics that regularly interfere with the basic functioning of the federal government.

Republicans today are the party of Rush Limbaugh, Sean Hannity and Tucker Carlson — a coalition that, in the face of every demographic trend in America, will mean the long-term realignment of the federal government behind the Democrats.