Some of the most zealous “Never Trump” conservatives are seeking a candidate to challenge President Trump in the 2020 Republican primaries. It’s an uphill slog in GOP politics, where the incumbent president enjoys substantial support and huge tactical advantages. But the Never Trumpers’ task could be further complicated by developments on the Democratic side of the race.

The dilemma: A primary challenge could weaken Trump and ensure the election of a Democrat. And as the Democratic Party lurches left, that could mean the work of “Never Trump” conservatives ensures the election of a radical candidate on a platform of the “Green New Deal,” tax rates above 70 percent, universal healthcare, free college, even more liberal abortion policies, and more. It would be hard to imagine a more self-defeating result for activists who previously worked in conservative Republican politics.