Joe Biden’s role in the White House is already a thing of the past. RadarOnline.com can reveal the embarrassing mishap that Press Secretary Karine Jean-Pierre made when asked about Biden’s conversation with Barack Obama at Ethel Kennedy’s funeral. Biden and Obama, 63, appeared to be discussing Vice President Kamala Harris’ chances of winning the White House, as the 81-year-old seemed to say, “she’s not as strong as me,” to which Obama apparently replied, “I know… that’s true… we have time.” Biden appeared to back his predecessor up, and responded: ‘Yeah, we’ll get there in time.’ On Thursd…