While he remains the most influential of the nation's growing number of progressive mayors, de Blasio has been weakened and frayed by some policy decisions that alienated key groups of supporters, by incidents of inept governance, and by the stench of old-style pay-to-play corruption. Nonetheless, decades of a widening gulf between the nation's super-rich and the vast majority has now unleashed a new urban movement that will not be easily contained. The fight to reclaim Gotham in the 21st century has only just begun.