Is Trump making Iran look good?

President Trump told world leaders at the UN that the nuclear deal with Iran and other nations was an "embarrassment to the United States." Iran's President Rouhani went home and presided over a parade including new long-range ballistic missiles -- which were not part of the deal. But Trump and US hardliners say they should have been, and should be in the future. So they're calling for re-negotiation. Critics call that so unlikely it puts American diplomats in a bind — especially when North Korea already has nuclear weapons and accuses the US of "declaring war."