Iran on Monday vowed a “decisive” and “crushing” retort should the United States label its Revolutionary Guard Corps (IRGC) as a terrorist organization.

“We are hopeful that the United States does not make this strategic mistake,” said Bahram Qasemi, a spokesman for the foreign ministry, as reported by Reuters.

“If they do, Iran’s reaction would be firm, decisive and crushing and the United States should bear all its consequences.”

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The comments come as President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE is reportedly planning to decertify the Iran nuclear agreement, which provided Tehran with sanctions relief in exchange for curbs to its nuclear program. Congress would have 60 days to reimpose sanctions on Iran should Trump decertify the accord.

The president is also projected to designate Iran’s Revolutionary Guard Corps as a terrorist organization, according to the news outlet.

Mohammad Ali Jafari, the commander of IRGC, warned the United States against re-implementing sanctions on Iran, saying Sunday that doing so would place U.S. military bases at risk.

“If the news is correct about the stupidity of the American government in considering the Revolutionary Guards a terrorist group, then the Revolutionary Guards will consider the American army to be like Islamic State all around the world particularly in the Middle East,” Jafari said.