Russian President Vladimir Putin.GAVRIIL GRIGOROV/SPUTNIK/AFP via Getty Images John Sullivan told CBS that Putin's reliance on Belarus to solve his problems shows "actual weakness." Belarus President Aleksandr Lukashenko helped to resolve the Wagner Group's uprising on Saturday. "It's not just an appearance of weakness, it's actual weakness," Sullivan said. Russian leader Vladimir Putin is showing how weak he is by relying on Belarus President Aleksandr Lukashenko to help resolve the Wagner Group's uprising, said a former US ambassador to Russia."How dependent now is Putin on Lukashenko?