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.

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 weapons to Ukraine via NATO and threatened Russia with new tariffs if the war does not end in 50 days.

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

Melania Trump has highlighted Russia's continued attacks on Ukraine in private conversations, President Trump said on Monday.

Keir Starmer, the British prime minister, and Emmanuel Macron, the president of France, are expected to promise today to have their nuclear arsenals work together if Europe is threatened. Private equity firms have entered the $40 billion youth sports industry. Their investments could raise costs for families.

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The U.S. plans to sell Patriot missile batteries — systems ideal for shielding territory against incoming missile attacks — and other weapons to European allies that would be transferred to Kyiv.

Trump's move in the first half of 2025 to reset economic ties with Moscow also raised concerns about whether Biden-era sanctions aimed at choking revenues for Putin's war machine would be eased. The president's tone has shifted both towards Putin and regarding the continuation of U.