Russia and China have been slow to accost Iran because of their large investments and contracts they have won from Iran.
Perfect:
"Moscow, with a $1 billion stake building Iran's first atomic reactor, and Beijing, reliant on Iranian oil for its burgeoning economy, have so far blocked a consensus for referral within the International Atomic Energy Agency."
Sometimes the politics of opportunity aren't always stacked against the United States; often times, the vested interests of other states in their own economies play games as well. Naturally, these nations are slow to do anything because their reputation is at stake.
Many would make an argument that France and Russia each opposed wars in Iraq from economic points of view,
the Russians with a $7 billion debt owed to them by Hussein from Soviet times, and France had a $20 billion contract through Lukoil to drill in Iraq.
Many leftists would say that our calls for resolution of this problem are us 'coming down hard on Iran,' and 'setting the stage for another imperialist invasion.' But in reality, it is a situation where other states drag their feet because of the economic investment which they have in the nation.
Many people make out American wars as if it is aggression in the name of oil, but few people make out unreasonable peace efforts by other states as attempts to protect their own investments.