The Times is taking the rare step of publishing an anonymous Op-Ed essay. We have done so at the request of the author, a senior official in the Trump administration whose identity is known to us and whose job would be jeopardized by its disclosure. We believe publishing this essay anonymously is the only way to deliver an important perspective to our readers. We invite you to submit a question about the essay or our vetting process here. [Update: Our answers to some of those questions are published here.]

President Trump is facing a test to his presidency unlike any faced by a modern American leader.

It’s not just that the special counsel looms large. Or that the country is bitterly divided over Mr. Trump’s leadership. Or even that his party might well lose the House to an opposition hellbent on his downfall.

[The author of this Op-Ed will publish a book in November 2019 titled “A Warning.”]

The dilemma — which he does not fully grasp — is that many of the senior officials in his own administration are working diligently from within to frustrate parts of his agenda and his worst inclinations.