I listened to this interview of RFK Jr conducted by Jordan Peterson in segments.  It's over 90 minutes long.  It's clear now why the DNC won't allow a Democratic primary debate:  Biden would lose and lose badly.  RFK's positions would resonate with a lot of Democrats as well as a lot of independents, and more than a few Republicans.
Rekindling the Spirit of the Classic Democrat | Robert F. Kennedy Jr. | EP 363
https://youtu.be/W1h5AhrDajI