The United States believes Russia underestimated the strength of Ukraine’s resistance before launching an invasion that has likely caused thousands of Russian casualties, the Biden administration's top intel official told lawmakers Tuesday. (March 8) Subscribe for more Breaking News: http://smarturl.it/AssociatedPress Website: https://apnews.com Twitter: https://twitter.com/AP Facebook: https://facebook.com/APNews Instagram: https://www.instagram.com/APNews/ ​ You can license this story through AP Archive: http://www.aparchive.com/metadata/youtube/c80d722a5ba34d6b9e869289e705c877