Keir Starmer, the British prime minister, and Emmanuel Macron, the president of France, are expected to promise today to have ...

MICHAEL KIMMAGE is Professor of History at the Catholic University of America. He is the author of Collisions: The Origins of the War in Ukraine and the New Global Instability.

New developments Tuesday reinforced the idea that President Donald Trump has significantly shifted his view of the Ukraine ...

Putin mistook Trump’s restraint for weakness. Now, with its allies emboldened and patience exhausted, the United States will ...

The Russian leader is convinced that Moscow’s battlefield superiority is growing, and that Ukraine’s defenses may collapse in ...

Back-channel contacts, direct diplomacy and a multibillion-dollar weapons deal helped align the U.S. and Europe on arming Ukraine.

President Donald Trump seems to have learned the lesson painfully gleaned by all his 21st-century predecessors: You can’t ...

But his frustration with Putin has grown. Last week, the president said the United States was taking “a lot of bullshit” from Putin. Today, he authorized a significant shipment of U.S. defensive ...

NATO Secretary General Mark Rutte discusses President Donald Trump's decision to sell weapons to NATO for Ukraine in an ...

Ever since his political rise a decade ago, Donald Trump has sung the praises of Vladimir Putin -- the Russian president was ...

A new tribunal targets the act that made all subsequent Russian war crimes in Ukraine possible.

The call marked the sixth publicly acknowledged conversation between the two leaders since Trump returned to office earlier ...