U.S. President Donald Trump warned on Monday that he will impose “very severe” 100% tariffs on Russia if Moscow fails to agree a deal to end the war in Ukraine within 50 days. The threat marks a sharp escalation in economic pressure and includes so-called secondary tariffs aimed at countries that continue to trade with Russia. Trump delivered the ultimatum during an Oval Office meeting with NATO Secretary General Mark Rutte, saying he intends to use trade measures to force a cease-fire. “We’re going to be doing very severe tariffs if we don’t have a deal in 50 days,” he said, adding that other sanctions would follow if the deadline passes without progress. Alongside the tariff threat, Trump announced a renewed pipeline for U.S. weapons to Kyiv. European allies will purchase “billions and billions” of dollars’ worth of American military equipment— including Patriot air-defence systems— and transfer them to Ukraine, he said, arguing that the arrangement will speed deliveries while shifting the cost to Europe. Details of how the tariffs would be enforced have yet to be released, and the Kremlin has not issued a formal response. Analysts note that secondary duties could hit major buyers of Russian oil such as China, India and Türkiye, while also risking higher global energy prices. The move underscores Trump’s frustration with Vladimir Putin after months of stalled cease-fire talks.