President Donald Trump, right, meets with Ukrainian President Volodymyr Zelenskyy in the Oval Office at the White House, Friday, Feb. 28, 2025, in Washington. (AP Photo/ Mystyslav Chernov)Ukrainian President Volodymyr Zelenskyy is speaking about his historic Oval Office clash with US President Donald Trump, defending his decision to speak up for his country at a critical juncture in its war against Russia.The two leaders sparred inside the White House in front of the whole world last month with Trump accusing his Ukrainian counterpart of “gambling with World War III” for arguing that Russian Presid