Piers Morgan calls pro-gun rights guest Larry Pratt 'an unbelievably stupid man'

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Piers Morgan had Larry Pratt, executive director of Gun Owners of America, on his show Tuesday night for a chat about American gun ownership in the aftermath of the Newtown school shooting that left the CNN host "seething" afterward.

Still seething after tonight's show. Just can't understand the mentality of those who insist the only answer to #Newtown is MORE guns.

— Piers Morgan (@piersmorgan) December 19, 2012

The exchange got especially tense when Pratt argued that gun violence rates were lower in places with lax gun laws than in what he called Morgan's "vaunted English bucolic countryside."

"Evil's in our hearts, not in our guns," Pratt said.

"You're an unbelievably stupid man aren't you," Morgan responded when Pratt said that Americans needed to be able to "defend themselves."

Morgan becomes visibly irate around the 3:45 mark, after which Pratt calls Morgan "morally obtuse" and Morgan tells Pratt he has "absolutely no coherent argument whatsoever."