The head of the North Atlantic Treaty Organization (NATO) on Thursday criticized Donald Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE for saying the U.S. should set conditions for helping NATO allies.

“Solidarity among allies is a key value for NATO,” Secretary General Jens Stoltenberg told BuzzFeed on Thursday.

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“This is good for European security and this is good for U.S. security. We defend one another. Two world wars have shown that peace in Europe is also important for the security of the United States.”

Trump told The New York Times on Wednesday that the U.S. should only help NATO partners who "fulfill their obligations to us."

“We are spending a fortune on military in order to lose $800 billion," the GOP presidential nominee said. "That doesn’t sound very smart to me. We are going to take care of this country first before we worry about everyone else in the world.”

Trump was specifically responding to whether he would help the Baltic states should Russia attack them, the Times reported.

Article 5 of the NATO treaty states that all 28 members — including the U.S. — must aid any member who comes under attack.

Estonian President Toomas Hendrik Ilves on Wednesday said his nation remains committed to the military alliance’s terms.