The concept: Bring back the Obama coalition! Increase the number of young and minority voters relative to 2016, while holding on to enough white workers to beat Trump.
The challenge: One of them has to eliminate the other and then inherit Biden’s realo voters after the latter is annihilated during the debates.
The prognosis: This concept worked in 2008 and 2012. In very different ways, I think both of them can appeal to enough white workers to win a general election. Can they get past Biden first? They will probably need some unwitting assistance from Warren for that to happen. Chance of success: 20 percent.