WASHINGTON — The staggeringly high rate of Russian casualties in Ukraine means that President Vladimir V. Putin may not be able to achieve one of his key war objectives: seizing the entire eastern region of the country this year, officials in the Biden administration and military experts say.
With 500 Russian troops killed or wounded every day, according to the latest estimate by American intelligence and military officials, Russia’s war effort has decelerated to a grinding slog, the officials said.
Russia’s glacial pace in the east has been further stymied by the arrival of American multiple-launch rocket systems, which have allowed Ukrainian troops to take back some territory and made it more difficult for Russian soldiers to reach other areas.
Earlier this summer, Russian forces captured the Luhansk region of Ukraine, the easternmost part of the country. But in neighboring Donetsk, their progress has stalled, in no small part because of heavy casualties, American military…