Russian President Vladimir Putin at the Tomb of the Unknown Soldier in Moscow in May 2020.KREMLIN PRESS OFFICE / HANDOUT/Anadolu Agency via Getty Images Russian President Vladimir Putin attacked Ukraine in February expecting an easy victory. Instead, Russia's failing war effort has raised doubts about Putin's hold on power. For now, Putin looks secure, but past Russian leaders have suffered at home for blunders abroad. Vladimir Putin expected an easy victory in Ukraine, but he has ended up with a fiasco.Over and over again, demoralized and ill-equipped Russian soldiers have raped, tortured, and looted their way through Ukrainian towns before fleeing in disgrace — often with highly motivated Ukrainian troops close behind them.In the greatest humiliation yet, Russian forces withdrew from Kherson — the only regional capital that they had captured — just weeks after Putin declared at a triumphant rally on Red Square that the city was "Russian forever."For now, Putin's rule appears secure.