Hillary Clinton Hillary Diane Rodham ClintonBiden leads Trump by 36 points nationally among Latinos: poll Democratic super PAC to hit Trump in battleground states over coronavirus deaths Battle lines drawn on precedent in Supreme Court fight MORE's campaign is firing back at 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 after the newly minted Republican nominee said certain conditions would need to be met before he would help allies in the North Atlantic Treaty Organization (NATO).

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“Tonight, Mike Pence Michael (Mike) Richard PenceMcConnell locks down key GOP votes in Supreme Court fight Momentum growing among Republicans for Supreme Court vote before Election Day Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election MORE said Donald Trump would stand with our allies. Tonight, Donald Trump flatly contradicted him," Clinton policy adviser Jake Sullivan said in a statement late Wednesday.

"For decades, the United States has given an ironclad guarantee to our NATO allies: we will come to their defense if they are attacked, just as they came to our defense after 9/11. Donald Trump was asked if he would honor that guarantee. He said ... maybe, maybe not."

Sullivan said Trump's comments to The New York Times show he is "temperamentally unfit and fundamentally ill-prepared" to be commander in chief. He added that Ronald Reagan and Harry Truman would be "ashamed."

"The President is supposed to be the leader of the free world. Donald Trump apparently doesn't even believe in the free world," he said.

In an interview published late Wednesday, Trump said he would aid NATO partners if "they fulfill their obligations to us."

“This is not 40 years ago," he said. "We are spending a fortune on military in order to lose $800 billion. That doesn’t sound very smart to me. To me, ‘America First’ is a brand-new, modern term. I never related it to the past. We are going to take care of this country first before we worry about everyone else in the world.”

Sullivan late Wednesday also called out Trump for his relationship with Russian President Vladimir Putin and for his response to the Brexit vote.

"Trump has apparently decided that America lacks the moral authority to advance our interests and values around the world. He has adopted the logic and positions of China, Russia, and Iran," he said.

"And there will be plenty of time in the days ahead to address his strategy to strengthen our coalition against ISIS, which apparently can be summed up in one word, 'meetings.'"

Trump's comments show presumptive Democratic nominee Hillary Clinton is the clear choice in this election, Sullivan said, noting the Democratic candidate will defend the country's allies and protests its people.

"And she will uphold a bipartisan tradition of American foreign policy that has made us the greatest force for peace, progress, and prosperity the world has ever known.”