The US has not been trying to talk to Iran at all. The US has been trying to fight, attack, humiliate and defeat Iran by imposing its will on Iran. All those actions have failed miserably. The US has been forced to pretend to play nice for a change. Iranians will act very carefully before they buy the BS from Obama.
One student killed, three wounded at Arizona campus during fight (a)
from the article: Obama: Get approval from Congress on Iran now