Secretary of State Mike Pompeo Michael (Mike) Richard PompeoOvernight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers Overnight Defense: House Democrats unveil stopgap spending measure to GOP opposition | Bill includes .6B for new subs | Trump issues Iran sanctions after world shrugs at US action at UN Navalny calls on Russia to return clothes he was wearing when he fell ill MORE said on Sunday that the U.S. tried and failed to achieve a side deal on the Iran agreement with its European allies.

"We did try," Pompeo told CBS News's Margaret Brennan on "Face the Nation."

"The president set out a set of objectives. He tasked me in my first couple weeks to work with Europeans to try and do it [strike a deal] although the work had been ongoing before I arrived at the State Department, and at no time were we able to reach an agreement," he continued.

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"The Europeans simply wouldn't exceed to the requirements to fix the deal. And so they had some 90 days to do so," he said.

Pompeo's comments follow President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE's decision last week to pull the U.S. from the Obama-era Iran nuclear agreement.

The U.S.'s European allies widely condemned the decision, and urged Iran to remain in the agreement.

“Our governments remain committed to ensuring the agreement is upheld, and will work with all the remaining parties to the deal to ensure this remains the case, including through ensuring the continuing economic benefits to the Iranian people that are linked to the agreement,” British Prime Minister Theresa May, French President Emmanuel Macron and German Chancellor Angela Merkel said in a joint statement.

White House national security adviser John Bolton said on Sunday that he believes the U.S.'s European partners will join the U.S. in withdrawing from the deal.

“I think the Europeans will see that it’s in their interests to come along with us,” Bolton said on CNN’s “State of the Union.”

"And they may try to [stay in the deal], in part because I think despite President Trump’s complete consistency in opposition to the deal … many people, including, apparently, former Secretary of State John Kerry, thought that we never would get out of it,” he continued.