The team was invited to the White House to celebrate last season's league title.
"It is my great privilege to say something that no other American president has ever had the chance to say before - welcome to the White House, Lionel Messi," Trump said.
The president also commented on the ongoing attacks on Iran carried out by the US and Israel - with Messi standing next to him - and claimed, among other things, that the countries "continue to completely demolish the enemy."
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