The important part of why he's back is that he can get mainstream Democrats (and whatever anti-Trump Bush-ites who are still in the Republican party) to listen to actual facts. Mainstream media has become so politically polarized and propagandized since he was last on TDS (far more so than back when Jon was railing at Crossfire) that the important bit is that Jon is a somewhat centrist, but kind of respected by both sides figure who can poke at both parties and get centrists and "moderate" Republicans to think about issues in a context outside of the usual Fox bubble.
