Mr. Trump wrote in a Truth Social post that Zelenskyy's forces are "in a position to fight and WIN all of Ukraine back in its original form" with Europe's help. Zelenskyy said he and Mr. Trump had a positive conversation on Tuesday, and he believes Mr. Trump's position on territorial swaps has changed. Mr. Trump has pressed both Russia and Ukraine to reach a ceasefire deal to end their more than three-year-long war, which began when Russia invaded Ukraine in February 2022. Mr. Trump has lashed out at both Zelenskyy and Russian President Vladimir Putin at various points. At other points, though, Mr. Trump and Zelenskyy have had a rocky relationship.