But the chief US negotiator in the Iran talks, Wendy Sherman, rejected that idea yesterday.She told reporters: “It would have been a little difficult when all of the (countries negotiating with Iran) wanted to go to the United Nations to get an endorsement of this, since it is a product of the United Nations process, for us to say, ‘Well, excuse me, the world, you should wait for the United States Congress.’”Sherman said the council resolution allows the “time and space” for a congressional review before the measure actually takes effect.