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

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.

The documents reportedly included plans for a canceled luncheon, seating charts, a gift presentation and phone numbers for U.S. and Russian officials.