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Syndicated columnist Charles Krauthammer said Monday the possibility the White House would reject a Senate proposal imposing new sanctions on Iran - a bipartisan deal that a group of Senators is expected to officially unveil soon - would show that the administration's attitude towards a deal with Iran is "fatuous."

The Senate plan would impose sanctions on Iran only if the recently reached Geneva deal falls through. On Saturday, President Obama said, "we have to not constantly assume that it's not possible for Iran, like any country, to change over time."

But Iranian foreign minister Javad Zarif said if Congress does impose sanctions - even ones that wouldn't go into effect for six months - "the entire deal is dead."

"That statement shows how fatuous is the president's statement that we just heard, that we mustn't assume that a regime can't change it's behavior," Krauthammer said on "Special Report with Bret Baier."

"All of the evidence is that the Iranian regime has not changed its behavior."

Krauthammer said the Senate deal would simply enforce the same plan outlined in the Geneva deal - Iran would have to dismantle plutonium facilities, destroy enriched uranium, and dismantle centrifuges that are used in the enrichment process.

"That's simple. One, two, three points, and that would end the program and create a new era of peace between the west and Iran," Krauthammer said.  "Either it's done, or it's not. That's exactly what we want, and why would the administration reject a resolution which would enforce every element of the plan it says it already has?"