Former President Barack Obama praised President Joe Biden, even as reports claim that Obama's former vice president feels betrayed.Charly Triballeau/AFP via Getty ImagesBarack Obama underscored his support of Vice President Kamala Harris in his DNC speech.Obama also praised President Joe Biden, who is reportedly miffed over Obama's recent actions.Obama overlooked Biden before, and it nearly destroyed his presidential legacy.Barack Obama basked in the glow of his hometown convention.