President Barack Obama has paid tribute to Vice President Joe Biden, praising him as an "extraordinary man with an extraordinary career in public service".
Former Vice President Joe Biden has told Oprah that he regrets he is not president while admitting he knew Hillary Clinton would not win the 2016 election.
"I have a regret that I am not president," Biden candidly told the talk show star. "Because I I think there's so muchopportunity. I think America's so incredibly well-positioned."
Biden was speaking to Oprah as part of his book tour.
The title of the new book, Promise Me, Dad, comes from his late son Beau Biden, asking that he be okay as he faced the cancer that eventually killed him.
He told Oprah that the grief of losing his son prevented him from entering the presidential race, which Donald Trump eventually won.
"Oprah, no woman or man should announce they are running for president unless they can answer two questions: One, do they truly believe they are the most qualified person for that moment. I believed I was," Biden said.
It was the second question that stopped him.
"But was I prepared to be able to give my whole heart, my whole soul and all my attention to the endeavour?" he said. "And I knew I wasn't."