Ukraine recaptured the city of Izium on Saturday, giving hope that the tide might finally be turning decisively against the Russian invaders. Not only are Russian forces in retreat, Vladimir Putin is facing increased criticism at home. There is even evidence of the Kremlin engaging in damage control to manage the domestic narrative.Still, we should not allow ourselves to be carried away by Ukraine’s recent success. Russia still has cards to play.In the build-up to the escalation in the south around the Ukrainian city of Kherson, Russia redeployed much of its forces to that region. In the process of doing...