Russia launched its largest attack of the month against Ukraine while Ukrainian President Volodymyr Zelenskyy met with U.S. President Donald Trump and European leaders.

United States and NATO officials were set to meet Wednesday to discuss security guarantees for Ukraine as the White House worked to arrange a summit between Volodymyr Zelenskyy and Russia's Vladimir Putin.

President Trump is hosting Ukrainian President Volodymyr Zelenskyy and several European leaders at the White House on Monday. Follow live updates.