Trump appeared to place the onus of ending the war on the Ukrainian leader, while emphasizing that Ukraine must give up Russian-annexed Crimea and its hopes of joining NATO — key Kremlin demands.

President Donald Trump is scheduled on Monday to welcome Ukrainian President Volodymyr Zelenskyy to the White House for a high-stakes meeting as the U.S. president pushes for a deal to end Moscow's war on its neighbor. A host of European leaders will join the pair.

Ukrainian President Volodymyr Zelenskyy gushed with gratitude toward President Donald Trump during an Oval Office meeting.

Ukrainian President Zelenskyy and other European leaders will meet with President Trump at the White House today after Trump's summit with Russian President Putin on Friday. NBC News' Yamiche Alcindor and Richard Engel report the latest.

Ukraine is grateful for the new NATO program that allows member states to purchase weapons from the United States for delivery to Kyiv, Ukrainian President Volodymyr Zelenskyy said during a meeting with US President Donald Trump in the Oval Office.