CNN: “Stiffer than expected Ukrainian resistance and Russia’s own logistical missteps have bogged down Russia’s advance, sparking a fragile optimism. The US has also continued sharing downgraded intelligence with the Ukrainians, including about Russian military moves, in an attempt to help Ukraine on the battlefield.”
“But intelligence and defense officials closely tracking the Russian campaign say that Putin still holds a number of moves in reserve that could devastate the Ukrainian resistance.”