Dave, the US and allies have been back-channeling this "Iran opening" for years, before Rouhani's election, right down to every gesture. Neither could be pally without big blowback for Obama, and Rouhani with Republican Guard.
The same "back-channeling" with North Korea bought enough time for that starving country to build nuclear weapons. Bush wanted tougher sanctions and liberals wanted Kumbaya and food, medical, and energy assistance for the North Koreans. Too many liberals never learn from history. No matter though because they are adept at refusing to accept blame.
