The Russian billionaire who founded the notorious Wagner Group paramilitary confronted President Vladimir Putin about the mismanagement of the war in Ukraine, two US officials familiar with the matter told The Washington Post.Yevgeniy Prigozhin met with Putin in private earlier in October to voice dissent as Russia chalked up mounting losses and failures in the face of Ukraine's counteroffensive, per The Post.Experts say the private meeting was an indication that Prigozhin is comfortable enough to discuss sensitive matters with Putin and that his influence is growing.After years of staying quiet about his links to the organization, Prigozhin acknowledged earlier this month that he in fact founded it, Foreign Policy reported.After Ukraine recaptured swathes of territory in its northeastern Kharkiv region last month, Chechen leader Ramzan Kadyrov suggested that the military had made "mistakes" and that Putin might not be aware of what is happening on the ground, The Guardian reported."