"Putin faces many challenges," retired U.S. Major John Spencer told Newsweek, after Russia's retreat from Kherson.
A Russian flag was pulled down from the administration building in Kherson just last week.
Ukraine's Ministry of Defense published a video that appears to show Ukrainian attacks on Russian columns retreating across the Dnieper River.
Mobilized soldiers only have about 100 rounds of ammunition for 20 to 30 people, one woman claimed.
The U.S think tank said Ukraine's forces might have the advantage over Vladimir Putin's troops in the cold weather.
"Ukraine's plan is to take as much territory and have as much battlefield success as possible prior to the winter."
"Caving in to the Kremlin's blackmailing would affect Western governments' credibility," said one Russian expert.
The far-right Rusich group criticized the retreat from the southern Ukrainian city on Telegram in a message aimed at "the clowns from the Moscow Region."
"Deserters who abandoned the combat order and betrayed their comrades" should face the death penalty, said Kremlin propagandist Vladimir Solovyov.
Liberating troops will have to contend with a dangerous urban environment and a uniquely challenging front line.
Russian state television has previously made claims about Moscow's ability to influence the U.S. electoral system.
"I'm ready to tear them apart. They have to do something...we want them to be taken out as they have a lot of wounded," one woman said.
Ukrainian officials, including President Volodymyr Zelensky, say they are skeptical of Russia's intentions in retreating from Kherson.
Kremlin propagandist Vladimir Solovyov said that announcing Russia's withdrawal from the southern Ukrainian city earlier would have helped the Democrats.
Videos on surviving a nuclear explosion have gone viral amid Russia's war in Ukraine.
Putin's bunker is thought to be deep beneath Mount Yamantau, around 230 miles from the site of the third worst nuclear disaster in history
The pair are set for their first face-to-face meeting since Joe Biden was elected U.S. president two years ago.
Sergey Surovikin, head of Russia's forces, said troops would be retreating to "preserve the lives of our soldiers and the combat capability of the troop group."
The withdrawal is "one of the few admissions by the Russian states that the war is not going well," the director of the Wilson Center's Kennan Institute said.
Students will learn combat training, the basics of shooting, and the use and construction of hand grenades, among other skills, a Russian official said.
Viktor Cherkesov fell out of favor with the Russian president after he had criticized the corruption of Russia's security services.
Fears about the use of atomic weapons by Russian President Vladimir Putin continue to grow.
Vladimir Solovyov started his show Full Contact with the words, "Happy interference in the U.S. elections day."
An article in the publication "Military Thought" said NATO and the U.S. are looking at "preemptive forceful actions" against Russia.
His wife said his mobilization may be the revenge of the local "elites," according to local media sources.
Ukrainian President Volodymyr Zelensky said Russia's military was continuing its push to capture Donetsk despite its troops suffering "extremely" heavy losses.
Senior U.S. administration officials said President Biden will discuss Taiwan tensions and the war in Ukraine during summits in Cambodia and Indonesia.
Nigel Gould-Davies wrote that Russia was "losing on the battlefield and unable to mobilize society."