Why, then, do the Frenches insist on attacking Christians who support Trump not on a rational, political basis, but on the basis that their support for Trump implicates their faith and undermines their witness?

Understand what they are saying: if a Christian acts in a way that undermines his witness for Christ, he is in sin. And in the case of the Huckabees and Franklin Graham, it would be very public sin given their high profiles. This is a serious charge that David French does not take the time to substantiate.

He claims that Graham abandoned “Christian principles,” but what principles does he claim were abandoned? He doesn’t say, so one can only infer. I suspect the Frenches don’t think Donald Trump is very nice. He’s loud, he’s aggressive, and he attacks his political enemies. They oppose his policies too—both are on the record as war hawks who believe in an aggressive American military posture abroad, both believe in mass immigration of the Paul Ryan variety, and both seem content to follow like a shadow behind liberalism’s relentless march—never objecting very much to the direction, just the pace.

But mostly it seems to be about taste: Trump is brash and politically heterodox politically, while the Frenches are defenders of the status quo. Fine—but why try and theologize it?