The White House confirmed that Trump and Zelenskyy discussed whether Ukraine would be able to strike Moscow and St. Petersburg with U.S.-supplied weapons.

With the change, the Trump administration has also backed away from a signature effort to stay ahead of China in the A.I. race. The U.S. government had been concerned that the Chinese military could use A.I. chips to coordinate attacks and develop weapons and had also wanted to preserve the U.S. lead in developing A.I. systems.