Reince Priebus, the chief of staff whose job insecurity has been the subject of endless speculation, outdid them all, telling the president — and the assembled news cameras — “We thank you for the opportunity and the blessing to serve your agenda.”

So it went on Monday in the Cabinet Room of the White House, as Mr. Trump transformed a routine meeting of senior members of his government into a mood-boosting, ego-stroking display of support for himself and his agenda. While the president never explicitly asked to be praised, Mr. Pence set the worshipful tone, and Mr. Trump made it clear he liked what he heard.

“Thank you, Mick,” he told Mick Mulvaney, his budget director. “Good job,” he told Scott Pruitt, his E.P.A. chief. “Very good, Daniel,” he said to Dan Coats, the director of national intelligence.

The commander in chief, who has been known for decades as a fan of flattery and who speaks of himself in superlatives, even indulged in a bit of self-congratulation. He declared himself one of the most productive presidents in American history — perhaps Franklin D. Roosevelt could come close, he conceded — and proclaimed that he had led a “record-setting pace” of accomplishment.

Never mind that Mr. Trump has yet to sign any major legislation, or that his White House has been buffeted by legal and ethical questions surrounding the investigation into his campaign’s possible links to Russia and his firing of the F.B.I. director who had been leading that inquiry.