Yes, Donald Trump is still leading in the national polls, but we turn to slightly more serious topics today as a nuclear deal is struck with Iran. We play extended excerpts from the President's announcement and the (predictable) responses from those who who oppose the agreement. WI Gov. Scott Walker opposes the deal for ridiculous reasons, but his domestic policy is a different and far more disturbing issue, and one that is sweeping the GOP. We talk to constitutional law expert Ian Millhiser about the rise of a once left-for-dead legal/political/Constitutional theory rising up once again, with serious Presidential contender Walker leading the charge. Not a dime's worth of difference between the two major parties? We discuss, you decide...