Sean Hannity tonight clashed with Pat Buchanan over nuclear weapons negotiations with Iran.

Hannity said it should be a prerequisite for Iran to stop being a state sponsor of terror and chanting, “Death to America.”

Buchanan disagreed, explaining that America has to talk to its enemies. He added that Iran is fighting ISIS, and said he’d rather Iran does it so the U.S. doesn’t have to send Americans.

Buchanan also said that he’s not scared of Iran because they don’t have an atomic bomb.

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“Now you sound like Obama, ‘Iran is a tiny country, they’re not a threat.’ You believe that?” Hannity pressed.

“Bibi’s sitting on 200 atom bombs, and he’s fretting over Iran, which hasn’t even produced weapons-grade uranium,” Buchanan fired back.

Hannity argued that this will create an arms race “the likes of which the world has never seen before.”

“Oh, cut it out, Sean!” Buchanan said.

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“Now, you’re putting nuclear weapons in the hands of radical Islamic mullahs,” Hannity said. “You really want that? You don’t see that as a danger?”

“The United States could finish off Iran in an afternoon,” Buchanan said. “What are you frightened of, Sean?”

Watch the fiery debate above.