Democrats are denouncing a letter to Iran written by Republican Sen. Tom Cotton and signed by most of the 54 Republican senators
Democrats are denouncing a letter to Iran written by Republican Sen. Tom Cotton and signed by most of the 54 Republican senators.The letter warns that any nuclear deal would need to be ratified "by two thirds vote." Vice President Joe Biden said the letter "undercuts" President Obama and his nuclear negotiators. Nancy Cordes reports.
