Fox News contributor Marc Thiessen said a proposed nuclear deal with Iran is a complete disaster based on leaked terms.

The criticism highlights a deepening divide over how the U.S. should manage Iranian nuclear ambitions and whether diplomatic agreements can be trusted without rigorous enforcement mechanisms.

Thiessen detailed his concerns across various Fox News programs, including "The Story," and through Fox News Radio commentary. He said the agreement is fundamentally flawed and would ultimately benefit Iran rather than securing regional stability. The contributor said the proposal is a danger to U.S. security because it lacks the necessary tools to ensure compliance.

"If the deal terms are accurate, as has been leaked, it's a complete disaster," Thiessen said.

Central to his critique is the issue of verification. Thiessen said that any agreement lacking direct enforcement is effectively meaningless. He used a metaphor to describe the fragility of the proposed terms, noting that without such enforcement, the paper the deal is written on is "toilet paper."

Despite his opposition to the current proposal, Thiessen noted the impact of previous administrations on the issue. He said that Donald Trump has done more damage to the Iranian nuclear program than any president in history.

Thiessen's warnings come as a broader debate continues regarding the efficacy of sanctions versus diplomatic treaties. He said the current direction of the proposed deal is worthless and fails to protect the interests of the U.S., and its allies.

"If the deal terms are accurate, as has been leaked, it's a complete disaster."

This critique reflects a persistent school of thought in U.S. foreign policy that views diplomatic concessions to Iran as inherently unstable. By emphasizing 'direct enforcement,' Thiessen is arguing that the U.S. should prioritize a 'maximum pressure' approach over a negotiated settlement that may allow Iran to maintain some level of nuclear capability or avoid strict oversight.