To the West, the move of sanction will only have impact on the industrialized economies more than Iran because the oil prices was already pretty high. USA is weak but lonely this time as it is hardly to negotiate with Islamic Republic and achieve the agreement with EU. It seems EU will keep the same stance with Iran this time. As the fourth largest oil exporter country, Iran has got strong power to cope with any sanctions if imposed, but it is also clear: it will suffer from restrictions on financing and broad cooperation from EU after war.