Quick note on the Democratic battle - Warren takes the place of Sherrod Brown and Biden takes the place of Cuomo. If you'll notice, Warren is the firebrand who is incapable of forming a General election coalition and has the foresight to see the future Democratic majority but not the Rooseveltian-Reagan chops to take it there (much like Sherrod Brown, I guess) and Biden is the aging establishment choice. I think Buttigieg would be a possible realignment choice but at this point, he's too young and inexperienced in forming a major coalition. (Roosevelt and Reagan were former Governors; Lincoln had significant experience in the Illinois state House and the Whig & GOP by the time he was President, Jefferson was part of the Founding Fathers).
I was thinking that Buttigieg could work as an alternative choice as the realigning President as well. Presuming that he loses in the primary this time around, maybe he'll have the experience necessary by 2024 depending on how he spends the next couple of years.
I actually have Mayor Pete in my mind as the confirmation president for some reason or at least close to the characteristics of the confirmation Democratic White House of the 2040s.
I'm not sold he's the realigning President because honestly he's too young and inexperienced to have the job of crafting a decades long new coalition that ushers in a radical period of change. That sort of stuff requires an experienced hand.
(I also believe this is principally why Pence wins the 2020 election)
For the record in related news impeachment of Trump has crossed a critical 50% threshold. I think the odds of Trump taking a deal and resigning is pretty good at this point.
So I think we all should brace for President Michael R. Pence.
Wait are you being serious?