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'Nuclear Power': NATO Ally Issues Trump Credibility Warning Over Russia

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Robert Birsel is a Newsweek reporter based in Asia with a focus on political and general news. Robert joined Newsweek in 2025 from Radio Free Asia and had previously worked at Reuters. He is a graduate of the London School of Economics. You can get in touch with Robert by emailing r.birsel@newsweek.com. Languages: English.

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Shane Croucher is a Breaking News Editor based in London, UK. He has previously overseen the My Turn, Fact Check and News teams, and was a Senior Reporter before that, mostly covering U.S. news and politics. Shane joined Newsweek in February 2018 from IBT UK where he held various editorial roles covering different beats, including general news, politics, economics, business, and property. He is a graduate of the University of Lincoln, England. Languages: English. You can reach Shane by emailing s.croucher@newsweek.com

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French President Emmanuel Macron warned that the global credibility of the U.S. and its NATO allies is on the line in Ukraine, as President Donald Trump attempts to end the Russian invasion once and for all.

There remain significant barriers to a settlement that ends the conflict, most notably on territorial control. Ukraine has consistently said it is constitutionally bound not to cede any of the fifth of its territory that Russia has seized.

Kyiv and its European allies have urged Trump not to reward Russia for its aggression in Ukraine, saying it has broader consequences for security on the continent, fearing Moscow has similar ambitions elsewhere in the former Soviet sphere.

“What’s happening in Ukraine is extremely important for Ukrainian people, obviously, but for the whole security of Europe,” Macron told NBC News’s Kristen Welker in an interview after a multilateral White House meeting with Trump.

“Because we speak about containing a nuclear power, which decided just not to respect international borders anymore. And I think it’s very important for your country, because it’s a matter of credibility.

“The way we will behave in Ukraine will be a test for our collective credibility in the rest of the world.”

This is a developing article. Updates to follow.

U.S. President Donald Trump hosts a meeting with Ukrainian President Volodymyr Zelensky and European leaders, including French President Emmanuel Macron (L) at the White House on August 18, 2025 in Washington, DC. U.S. President Donald Trump hosts a meeting with Ukrainian President Volodymyr Zelensky and European leaders, including French President Emmanuel Macron (L) at the White House on August 18, 2025 in Washington, DC. Win McNamee/Getty Images