US President Donald Trump says he is close to deciding whether to launch “a massive attack” against Iran.

But, senior fellow at Defence Priorities and a former US Marine Gil Barndollar believes that that like many of Trump's threats, this is unlikely. 

"He's already killed the Supreme Leader. He's already done a tremendous amount of damage to Iranian infrastructure..." he told Heather du Plessis-Allan. 

"You know, what more can he really do after that?"

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