Barack Obama picked Biden “out of the garbage heap” to be his running mate in 2008, the current president said.
ref:https://www.washingtonpost.com/politics/i-dream-about-biden-trump-says-hed-have-no-problem-beating-the-former-vp-in-2020/2018/07/19/43a65432-8b4c-11e8-8aea-86e88ae760d8_story.html