The former Polish president's letter expressed "fear and distaste" regarding Trump and Zelenskyy's contentious White House meeting on Feb. 28, 2025.

The U.S. move won’t have an immediate impact on the battlefield, where Kyiv’s forces are struggling to stem a relentless Russian offensive in eastern Ukraine. Ukrainian forces have slowed Russian advances along the roughly 1,000-kilometer (600-mile) front line, where Russia is slowly gaining ground at a huge human and material cost.

All shipments of U.S. weapons to Ukraine stopped in their tracks after President Donald Trump ordered the pause on aid on Monday.