“There is a more straightforward reason why not a single Democrat backed the legislation: The GOP not only entirely excluded Democrats from the process of drafting the bills, but the party punished Democratic constituencies—from residents of high-tax states to graduate students—in the bills’ substance. The tax plans represent a political closed circle: bills written solely by Republicans and passed solely by Republican votes that shower their greatest benefits on Republican constituencies. Meanwhile, the biggest losers in the plans are the constituencies of the Democrats who universally opposed them. It’s not just redistribution: The tax bills are also grounded in retribution.”

“In that way, the tax debate offers the clearest measure of how powerfully the Republican Party in the Trump era is folding inward. Neither Trump nor GOP congressional leaders are even pretending to represent the entire country—or to consider perspectives beyond those of their core coalition.”