On Friday, the White House named two executive committees that are to be staffed largely by Mr. Trump’s close aides, businessmen, and Middle Eastern officials. One of the committees is specifically focused on overseeing Gaza. It includes Tony Blair, the former British prime minister, and Yakir Gabay, an Israeli businessman — but no Palestinians.

The White House has said the executive committee will carry out the vision of a Trump-led “Board of Peace,” whose members have not yet been named.