Joe Biden’s age and mental acuity are center stage after a Justice Department prosecutor described him as an “elderly man with a poor memory.” Vox reporter Christian Paz explains why Democrats are stuck with him.This episode was produced by Miles Bryan and Jesse Alejandro Cottrell, edited by Matt Collette, fact-checked by Laura Bullard with help from Avishay Artsy, engineered by Patrick Boyd, and hosted by Noel King.Transcript at vox.com/todayexplainedSupport Today, Explained by making a financial contribution to Vox! bit.ly/givepodcastsLearn more about your ad choices. Visit podcastchoices.com/adchoices