European officials knew the president’s win would threaten the fundamental precepts of the post-World War II order. But the ...

Trump’s national security adviser, Mike Waltz, said the US president is “obviously very frustrated” with Ukrainian President ...

At Thursday's White House briefing, National Security Advisor Mike Waltz called on European allies to step up in the ...

NATO member states will “fight together” if needed, the UK’s defence secretary has pledged during a visit to Norway. John ...

Defense Secretary Pete Hegseth has ordered the military to prepare plans to make drastic budget cuts over the next five years ...

Defense Secretary Pete Hegseth has demanded that allies dramatically ramp up military spending and said U.S. security priorities lie elsewhere.

If Defense Secretary Pete Hegseth is serious about reducing military spending, he will need to embrace a narrower ...

Tensions between presidents Trump and Zelenskyy had been simmering behind the scenes before they went very public this week.

Asked if the UK could still "trust" the US president, John Healey did not answer directly, but said it was in Mr Trump's interest for a strong and unified NATO.

Former national security adviser John Bolton called President Trump’s positioning on ending the war in Ukraine “pretty close ...

John Healey pushed back against Trump’s characterization of Zelenskyy, likening the Ukrainian president’s leadership to that ...

I think President Trump—what makes him such an effective negotiator, I’ve seen this in private—is that he doesn’t take ...