WASHINGTON (AP) — In a striking anonymous broadside, a senior Trump administration official wrote an opinion piece in The New York Times on Wednesday claiming to be part of a group of people "working diligently from within" to impede President Donald Trump's "worst inclinations" and ill-conceived parts of his agenda.

Trump said it was a "gutless editorial" and "really a disgrace," and his press secretary called on the official to resign.

Trump later tweeted, "TREASON?" and in an extraordinary move demanded that if "the GUTLESS anonymous person does indeed exist, the Times must, for National Se...