Article continues below advertisementKamala Harris was well aware that Joe Biden was not feeling like himself during the 2024 presidential race.On the Thursday, October 30, episode of Steven Bartlett's "The Diary of a CEO" podcast, the former vice president revealed that even before Biden's infamous June 2024 debate with Donald Trump, something wasn't right.During the infamous interaction, he often stumbled over his words and forgot important facts while talking to the current president.