Speaking at a White House press briefing, Leavitt said any fresh talks would likely be in Pakistan again as it has emerged as the "only mediator"...
The Iranian delegation, led by parliamentary Speaker Mohammad Baqer Qalibaf and Foreign Minister Abbas Araqchi, arrived on Friday.
Iranian attacks have effectively closed the Strait, which carries a fifth of global oil and liquefied natural gas.
Netanyahu said he is sceptical of a deal but it must include enriched material leaving Iran.