The White House is working to drum up worldwide condemnation against Iran for the foiled plot to kill a Saudi ambassador on U.S. soil.
Iran claims the U.S. has made up the story, even as the U.S. explores more sanctions on Tehran.
However, getting the rest of the world to move against Iran will not be easy.
The administration is sending out its top diplomatic brass to express outrage over the plot to kill Saudi Ambassador Adel al-Jubeir in a Washington, D.C., restaurant.
"This kind of reckless act undermines international norms and the international system. Iran must be held accountable for its actions," Secretary of State Hillary Clinton said.
The White House has made clear is that it has no plans to take on Iran by itself. Vice President Joe Biden emphasized that more sanctions is the administration's goal.
"That the world is united, that it's not the United States versus Iran, that the isolation of Iran and the attempt to change the behavior is universal," Biden explained.
However, that may be easier said than done. For the better part of a decade, U.S. sanctions efforts against Iran has been less than effective -- stymied sometimes by Russia, sometimes by China, and sometimes by European nations who have business ties with Tehran.
Many Middle East observers believe the plot is a brazen escalation in Iran's 32-year record of hostile acts against the U.S.
House Speaker John Boehner, R-Ohio, said the administration will have bipartisan support but urged a tough stance against Iran.
"I would hope that our administration would hold the Iranian government, and hold their feet to the fire over the actions that have been alleged in this complaint," Boehner said.
Meanwhile, on the streets of Tehran, citizens are reading the headlines and wondering if the world will do anything about the latest threat from the mullahs.