March 20 (UPI) -- President Donald Trump on Friday called fellow NATO members "cowards" for not helping to reopen the Strait of Hormuz after U.S. and Israeli attacks on Iran effectively closed the waterway through which 20% of the world's oil is transported.

Trump made the comment days after demanding that other nations that rely on oil shipped through the Strait of Hormuz join his coalition to reopen and police the important trade route. It has become increasingly dangerous to transit the waterway between Iran and Oman amid ongoing violence in the region and after Iran closed the passage to the United States and its allies.

Trump called NATO a "paper tiger," an expression used to describe someone or something that purports to be powerful but is actually weak and ineffectual.

"They didn't want to join the fight to stop a Nuclear Powered Iran," Trump said in a post Friday morning on Truth Social.

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