Some of my middle-of-the-road columnist friends keep ascribing our difficulties to structural problems in our politics. A few call for a centrist third party. But the problem we face isn’t about structures or the party system. It’s about ideology — specifically a right-wing ideology that has temporarily taken over the Republican Party and needs to be defeated before we can have a reasonable debate between moderate conservatives and moderate progressives about our country’s future.

A centrist third party would divide the opposition to the right wing and ease its triumph. That’s the last thing authentic moderates should want…

We need moderation all right, but a moderate third party is the one way to guarantee we won’t get it. If moderates really want to move the conversation to the center, they should devote their energies to confronting those who are blocking the way. And at this moment, the obstruction is coming from a radicalized right.