U.S. President Donald Trump on Monday warned Russia to end its war in Ukraine within 50 days or face crippling new economic sanctions including 100% secondary tariffs targeting Moscow’s global trade partners.

Speaking alongside NATO Secretary-General Mark Rutte at the White House, Trump declared his administration’s mounting frustration with Russian President Vladimir Putin, accusing him of escalating rather than de-escalating the three-year-old conflict.

“We’re very, very unhappy with Russia,” Trump told reporters. “We’re going to be doing very severe tariffs if we don’t have a deal in 50 days, tariffs at about 100 percent. These will be secondary tariffs aimed at those still doing business with Russia.”

Trump also announced a landmark agreement with NATO under which the alliance will purchase billions of dollars\' worth of U.S. military equipment including the highly sought-after Patriot air defense systems to be distributed directly to Ukrainian forces.

“This is billions of dollars\' worth of military equipment going to NATO, and it’s going to be quickly distributed to the battlefield,” Trump said.

Rutte, a former Dutch prime minister, echoed the urgency, saying Ukraine would receive “massive numbers” of weapons as part of the deal. His visit marks the first to Washington since he famously referred to Trump as “daddy” at last month’s NATO summit in The Hague — a remark that drew widespread attention.

Upon beginning his second term in January, President Donald Trump  had sought to forge a new understanding with Putin and vowed to end the Ukraine war within 24 hours. That outreach, coupled with criticism of Ukrainian President Volodymyr Zelensky during a tense Oval Office meeting in February, had stirred concerns in Kyiv and across Europe that Trump might abandon the embattled country.

But recent Russian attacks including record-setting drone and missile strikes and new territorial gains appear to have hardened Trump’s position.

“I don’t want to say [Putin] is an assassin, but he’s a tough guy,” Trump said on Monday.

Last week, Trump teased a major announcement on Russia. Over the weekend, he confirmed the deployment of Patriot missile systems to Ukraine, reversing an earlier pause on some arms shipments.

In Kyiv, President Zelensky welcomed the renewed support following a high-level meeting with Trump’s special envoy, retired Lt. Gen. Keith Kellogg, who arrived in the Ukrainian capital on Monday.

Zelensky called the discussion “productive,” noting it covered air defense, joint weapons production, and procurement with European partners. “I am grateful to President Trump for the important signals of support and the positive decisions for both our countries,” Zelensky said.

On the frontline, Ukrainian soldiers expressed cautious optimism. One soldier, using the call sign Grizzly, told AFP: “Better late than never. Thanks to the Patriots, our families will be safer.”

Meanwhile, Russia claimed new battlefield advances, seizing two villages in the Donetsk and Zaporizhzhia regions. Ukrainian officials also reported that Russian shelling killed at least three civilians in Kharkiv and Sumy on Monday.

Back in Kyiv, political shifts are also underway. President Zelensky has nominated Economy Minister Yulia Svyrydenko as Ukraine’s next Prime Minister, signaling a potential cabinet reshuffle amid the ongoing conflict.

Svyrydenko acknowledged the critical moment in a social media post, saying: “Ukraine is facing a crucial time.”