Trump can readily negotiate with MBS (Saudis) and MBZ (Emiratis) via Bahrain.
Bannon
Barrack
Flynn
Gates
Giuliani
Kushner
Manafort
Nader
Prince
Trump Jr.
There were other Americans on the outskirts (e.g. McFarlane, later McFarland, Gerson, Broidy, Pecker, Hook, and others) and foreigners like Zamel, Dermer, al-Otaiba.