If the West's supply of oil is threatened by Iran, it is an act of "aggression" against the West. Iran will lose, and the Mullah's will be gone. The more they "push" the US and the West, the sooner they will be in danger as the US Presidential election is next year. O' Bama can not and will not be soft on Iran.
U.S. Senate votes overwhelmingly for tougher North Korea sanctions (Reuters)
from the article: Iran official: U.S. cannot stop us from cutting off world oil supply