Oh you want a roadmap from me? OK. It's beyond obvious that people want change. They want populists and most of them can't even tell the difference between left populists and right populists. So run and win with left populists. Build on Mamdani's win rather than pretending it's a fluke.
The Democrats instead run people who would have been considered Republicans in 2016, because they're going for the votes of Republicans who don't want populism. But those people by and large just stay home if they don't like the Republican nominee, as Harris should have learned but didn't.
The only hope for a political resolution to this is for those Democrats to be fired.