UNITED NATIONS — President Trump, who recently had Ted Nugent, Sarah Palin and Kid Rock over for a White House dinner, is planning to host 14 diplomats from around the world for lunch on Monday.

The diplomats are members of the powerful United Nations Security Council, an eclectic mix of America’s friends and rivals, and plenty of skeptics. Their guide to the White House is Mr. Trump’s outspoken envoy, Nikki R. Haley.

Halibut is on the menu, and a cheese soufflé, which one Council diplomat hoped would not be the most substantial part of the White House visit. As of Sunday, it was unclear who else the Council members would see, and whether Secretary of State Rex W. Tillerson would meet them.

The White House meeting follows a series of slights by the Trump administration toward the United Nations — and toward the idea of international cooperation in general. They include the administration’s antipathy to the climate agreement and the nuclear deal with Iran, its funding cuts to the United Nations population agency, and the broader funding cuts it has proposed for the world body.