My interpretation of Warren's maneuvering late this cycle is that she wants to run again. If so, I am not convinced that AOC will give up a safe house seat to challenge her. I'm afraid we might not have a socialist standard bearer in 2024.
Adding on to this, here is my shortlist:
Elizabeth Warren
Andrew Cuomo
Amy Klobuchar
Pete Buttigieg
Sherrod Brown
With the final showdown being between Warren and whichever of the others consolidates the "moderate lane." I highly doubt we will see anyone serious take up the Sanders mantle. Maybe Tlaib runs a vanity campaign if she loses reelection to the House.
