ratification. unfortunately, president obama has repeatedly defied the law and defied the constitution. and this iran deal, i believe, is an historic mistake. i believe it endangers the national security of this country. >> this is an unusual moment with an incredible risk to the world and our country and the region. requires -- it required an unusual method to deal with it. with regret i will send another tomorrow. i think at the risk of a nuclear iran is so great that we need to do everything possible to keep us from finding ourselves in a situation where we're going to have a nuclear iran. >> and there were seven republican senators who refused to sign that letter. one of them jeff blake of arizona, explains why. listen. >> i just didn't think it was productive to -- during this time when there are tough negotiations going. on they're tough enough without introducing this almost. i know that there's -- there are a lot of people who don't think that this agreement is going to be a good one. i think we value our doubts