Vladimir Putin’s conduct has prompted Donald Trump’s shift as Russia’s war effort in Ukraine has gotten only more aggressive.

Vladimir Putin is convinced his country is strong enough to secure total victory in Ukraine. But the Russian leader is ...

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

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.

President Donald Trump’s announcement on Monday about aid to Ukraine proves once again that he is nothing if not ...

Russian President Vladimir Putin has sacrificed an estimated 1 million of his soldiers, killed and wounded, in a three-year ...

I am very disappointed with President Putin,” Trump said July 13. “I thought he was somebody that meant what he said." ...

It remains to be seen just how lasting and severe President Donald Trump’s turn against Vladimir Putin will be. Trump has ...

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 ...

The United States said it would pause the delivery of some weapons to Ukraine as the Pentagon conducts a review of its ...

U.S. President Donald Trump repeatedly said during his campaign he would be able to end the war between Russia and Ukraine ...

Trump's threat against Russia runs parallel to a Senate-led effort to pass crippling sanctions on countries that buy Russian ...