In stunning scenes on Friday that sent political shockwaves across Europe, Zelenskyy was mocked and belittled by Trump and Vice President JD Vance, who accused him of not doing enough to end Moscow’s full-scale invasion and being ungrateful for American aid.

KYIV—A combative White House meeting has presented Ukraine with the prospect of fighting Russia without the support of its primary military backer through the first three years of the war. Now, the question is whether Europe has the firepower—and the political will—to help Ukraine hold off the Russians.

Volodymyr Zelenskyy openly challenged Donald Trump on his softer approach to Vladimir Putin and urged him to make "no compromises with a killer".