THE BURNED OVER DISTRICT

Everybody else does it, even when he has set the example to follow. And it worked when he was a big toad in the small pond of NY real estate development. Now he is on the world stage where everything is recorded so when he attempts to mock Sen. Al Franken for his sexual misconduct he is seeing the whole world come back with the question, What about when you did it?

Last fall, Donald J. Trump inadvertently touched off a national conversation about sexual harassment when a recording of him boasting about groping women was made public at the same time a succession of women came forward to assert that groping was something he did more than talk about.

A year later, after a wave of harassment claims against powerful men in entertainment, politics, the arts and the news media, the discussion has come full circle with President Trump criticizing the latest politician exposed for sexual misconduct even as he continues to deny any of the accusations against him.

In this case, Mr. Trump focused his Twitter-fueled mockery on a Democratic senator while largely avoiding a similar condemnation of a Republican Senate candidate facing far more allegations. The turn in the political dialogue threatened to transform a moment of cleansing debate about sexual harassment into another weapon in the war between the political parties, led by the president himself.

Indeed, Republicans on Friday were more than happy to talk about Senator Al Franken, Democrat of Minnesota, who apologized this week after a radio newscaster said he forcibly kissed her and posed for a photograph a decade ago appearing to fondle her breasts while she was sleeping. Democrats, for their part, sought to keep the focus on Roy S. Moore, the Republican candidate in Alabama who has been accused of unwanted sexual conduct by multiple women going back even further, including one who was 14 at the time.

But the notion that Mr. Trump himself would weigh in given his own history of crude talk about women and the multiple allegations against him surprised many in Washington who thought he could not surprise them anymore. A typical politician with Mr. Trump’s history would stay far away from discussing someone else’s behavior lest it dredge his own back into the spotlight. But as Mr. Trump has shown repeatedly during his 10-month presidency, he is rarely deterred by conventional political wisdom even as he leaves it to his staff to fend off the cries of hypocrisy.

“Like everything else Trump touches, he hijacks it with his chronic dishonesty and childishness,” said Mark Salter, a longtime adviser to Senator John McCain, Republican of Arizona. “The intense, angry and largely ignorant tribalism afflicting our politics predates Trump’s arrival on the scene. But he has infused it with a psychopath’s inability to accept that social norms apply to him.”

As expected, the White House staff and allies are spinning like a room full of dervishes trying to explain why Cheeto Mussolini is different. But when Cheeto steps in a pile of shit he just says it is someone else's fault and goes on.