In his Fox interview, Witkoff said: "I don't want to use the word 'frustrated'... because he [Trump] understands he's got plenty of alternatives, but he's curious as to why they haven't... I don't want to use the word 'capitulated', but why they haven't capitulated.
"Why, under this sort of pressure, with the amount of sea power and naval power that we have over there, why haven't they come to us and said, 'We profess that we don't want a weapon, so here's what we're prepared to do?'"
The envoy added: "And yet it's hard to sort of get them to that place."
BBC - Trump curious why Iran has not 'capitulated', US envoy Witkoff says