Ukrainian forces are pushing back Russian troops so successfully that the invaders have been forced to regroup, refit and refocus, White House national security adviser Jake Sullivan said Sunday. "They have retreated. They have pulled back from substantial territory in northern and northeastern Ukraine," Sullivan said. He credited the Ukraine military – and the flow of equipment the United States and its allies have been sending the besieged country. Russian Ambassador to the U.S. Anatoly Antonov, however, earlier told Newsweek the West is provoking Russia. "We warn that such actions are dangerous," the envoy said. "They can lead the U.S. and the Russian Federation onto the path of direct military confrontation." 🔗 Visit our link in bio for the latest. 📸: Sergei Supinsky, @afpphoto