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/todayexplained

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