U.S. President Donald Trump said on Tuesday that the United States would start imposing tariffs and other measures on Russia "10 days from today" if Moscow showed no progress toward ending its more than three-year-long war in Ukraine.

Russia launched yet another attack on Ukraine overnight, with more than 300 drones and seven missiles, according to Ukraine's air force. While most of the barrage was intercepted, the relentless attacks prompted President Trump to give his Russian counterpart an ultimatum.