(WASHINGTON EXAMINER) — The leader of the European Council warned Tuesday that President Trump needs to treat his international allies better because he can’t afford to lose any of them.

“Dear President Trump: America does not have, and will not have a better ally than Europe,” European Council President Donald Tusk said Tuesday. “[D]ear America, appreciate your allies, after all you don’t have that many.”

Tusk sent that message as Trump was on the way to Brussels for a NATO summit, the first stop in a diplomatic tour that will include a stop in the United Kingdom and a one-on-one meeting with Russian President Vladimir Putin. Trump is expected to make cost-sharing a key focus of the NATO summit, and he has already complained on Twitter that Europe is not paying its fair share.

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