Brinksmanship in the nuclear talks

While Iran and Washington seem to be on the same page regarding Iraq, things are a little rocky on the nuclear front. Iran missed an IAEA deadline ( and the US is applying new sanctions ( This is likely just posturing as the negotiations hit a critical stage, but brinksmanship is a dangerous game to play (
The reaction of Iran’s President Rouhani is perhaps the most interesting dimension to all of this ( After carving out a position as a moderate, he has started publicly criticizing the US. Again, this is part of the bargaining process. But it is also a response to hardline criticism in Iran. It is very reminiscent of the maneuvering displayed by Hashemi Rafsanjani when he was president in the 1990s.