Senate Foreign Relations Chairman Bob Corker on Thursday offered a scathing indictment of the Obama administration's shifting goals and rationales for its nuclear deal with Iran, going so far as to tell Secretary of State John Kerry that "I believe you've been fleeced" by Iran.

Corker said the agreement reached July 14 in Vienna would "codify a perfectly aligned pathway for Iran to get a nuclear weapon."

Turning to Kerry, who took notes as he spoke, Corker said: "What you have really done here is you have turned Iran from being a pariah to Congress – Congress – being a pariah."

The committee's ranking Democrat, Ben Cardin of Maryland, implored members to keep an open mind about the deal, in spite of deep skepticism that Iran can be trusted to keep it.

"We don't trust Iran. But we've got to leave emotion out of this," he said.