If there was one principle that used to unite conservatives, it was respect for the rule of law. Not long ago, conservatives would have been horrified at wholesale violations of the norms and traditions of our political system, and would have been appalled by a president who showed overt contempt for the separation of powers.

But this week, as if on cue, most of the conservative media fell into line, celebrating President Trump’s abrupt dismissal of the F.B.I. director, James Comey, and dismissing the fact that Mr. Comey was leading an investigation into the Trump campaign and its ties to Russia. “Dems in Meltdown Over Comey Firing,” declared a headline on Fox News, as Tucker Carlson gleefully replayed clips of Democrats denouncing the move. “It’s just insane actually,” he said, referring to their reactions. On Fox and talk radio, the message was the same, with only a few conservatives willing to sound a discordant or even cautious note.

The talk-show host Rush Limbaugh was positively giddy, opening his monologue on Wednesday by praising Mr. Trump for what he called his “epic trolling” of liberals. “This is great,” Mr. Limbaugh declared. “Can we agree that Donald Trump is probably enjoying this more than anybody wants to admit or that anybody knows? So he fires Comey yesterday. Who’s he meet with today? He’s meeting with the Soviet, the Russian foreign minister, Sergey Lavrov! I mean, what an epic troll this is.”