Antony Blinken actually said...

"Congress has to play a central role, if we get to an agreement, to make sure that Iran lives up to its commitments."

"We have worked with Congress in these sanctions to ensure that as the sanctions are enacted and as they are applied, we do it in a way to hold together the international coalition."

"the President has been clear that the United States will do what it must to prevent Iran from acquiring a nuclear weapon."

"the Americans who are detained illegally, erroneously, wrongly by Iran need to be released irrespective of these negotiations"