GOP Dissent over the Letter Sent to Iran on Nuclear Deal

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Forty-seven Republican Senators have sent an open letter telling Iran that any nuclear deal made by the current administration could be undone by the next one. In a written statement, Vice President Biden calls it a "false" and "dangerous" message that "our Commander in Chief cannot deliver on America's commitments" and a decision "to undercut our constitutional system." President Obama told reporters, "It's somewhat ironic to see some members of Congress wanting to make common cause with the hardliners in Iran. It's an unusual coalition" Michael Crowley is senior foreign affairs correspondent for Politico.