The White House said Monday it now estimates that just since December, Russia has suffered 100,000 casualties, including more than 20,000 killed

The White House says it now estimates that just since December Russia has suffered 100,000 casualties, including more than 20,000 killed, as Ukraine has rebuffed a heavy assault in eastern Ukraine. In what has become a grinding war of attrition, the fiercest battles have been in the eastern Donetsk region, where Russia is struggling to encircle the city of Bakhmut in the face of dogged Ukrainian defense. White House National Security Council spokesman John Kirby says the U.S. estimate is based on newly declassified American intelligence. He did not detail how the intelligence community derived the number.