Moscow’s forces are three miles from Dnipropetrovsk, a province they have never invaded. If they cross in, the advance would be a morale blow to Ukraine and complicate any territorial negotiations.

With the three-year war grinding on, Trump is sending Secretary of State Marco Rubio, national security adviser Mike Waltz and special envoy Steve Witkoff to Saudi Arabia for talks with Russian counterparts, according to a U.S. official who was not authorized to publicly discuss the upcoming diplomatic efforts and spoke on condition of anonymity.