President Donald Trump ripped French President Emmanuel Macron on Friday upon his arrival in France, calling him out for proposing a European military.

“President Macron of France has just suggested that Europe build its own military in order to protect itself from the U.S., China and Russia,” Trump tweeted Friday.

“Very insulting,” he added, “but perhaps Europe should first pay its fair share of NATO, which the U.S. subsidizes greatly!”

Trump is set to meet with Macron Saturday morning at the Élysée Palace in Paris, per USA Today.

Macron proposed, in an interview earlier this week, a “real European army” to protect against “China, Russia and even the United States of America.”

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“When I see President Trump announcing that he’s quitting a major disarmament treaty which was formed after the 1980s euro-missile crisis that hit Europe, who is the main victim? Europe and its security,” Macron said.