As much as I wish the Dems had been able to push a progressive agenda these past few years, I think that was likely not realistic. The Republicans poached a large chunk of the Dems’ former working class base. That was made possible by the Dems’ rightward shift in the 80s and 90s, which made them weaker in labor issues and thus more susceptible to being painted as the party of liberal, immoral, irreligious elites.
Like it or not, a significant slice of the Dem base at this point is former center-right Republicans who can’t tolerate the know-nothing populism of the modern GOP. I was just talking about the RNC with someone who fits that description today. Good luck selling those voters on progressive issues like student loan forgiveness, universal health care, higher capital gains taxes, or universal basic income.
Labor was the wind in the sails of progressive reform. We lost them by catering to Reaganist globalism and letting the GOP play to their worst social issue instincts.