Mr. Trump also suggested that a peace deal between Russia and Ukraine would include “some swapping of territories,” signaling that the U.S. may join Russia in trying to compel Ukraine to cede land.

President Trump has been stymied for months in his efforts to find a peace agreement between Russia and Ukraine, after more than three years of war.

U.S. President Donald Trump is planning to meet Russian President Vladimir Putin in person as soon as next week, according to the New York Times, which...