attention while observing your nuclear negotiations with our government you may not fully understand our constitutional system the letters that democrats fuming both on capitol hill and in the white house. kevin corke is live on the north lawn with this morning. the letter simply makes the point that no treaty will stand without the advice and consent of the u.s. senate. so the white house may use some different phraseology in this negotiation in order to perhaps get around that, right kevin? >> reporter: you're right on the money. to say they are steaming here is probably an understatement right? if you saw the press briefing yesterday, josh earnest the press secretary, very forceful in his condemnation of the letter and now even the vice president of the united states is weighing in. joe biden in this very strongly-written letter saying this about the 47 gop lawmakers who wrote to the islamic republic of iran. the letter sent march 9th by 47 republican senators to the islamic republic of iran expressly designed to undercut a