Trump didn't rule out the possibility of American troops' helping to guarantee peace between Ukraine and Russia should the leaders reach an agreement.

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

U.S. President Donald Trump says he has called Russian President Vladimir Putin and begun to arrange a meeting between Putin and Ukrainian President Volodymyr Zelenskyy, a critical step toward bringing a possible end to Russia's war on Ukraine.