Hard to say. There's nothing new about progressive politics. My own great-grandfather was a solid progressive. In a nutshell, it's about building a strong economy/nation from the bottom up. Without a strong foundation, the "building" is unstable and is prone to collapse. We've heard very little from actual progressives since the 1990s.
Progressive politics is rooted in the fact that all people have human worth, therefore human rights (food, shelter, etc.), regardless of class. No one's survival should be dependent on the whims of the job market or the gambling of Wall Street. In real life, not everyone is able to work, and there aren't jobs for all. In a developed nation, NO person should be denied basic human needs.
The US made some progress for a few years, via a legitimately progressive agenda. FDR implemented the New Deal, and LBJ built the Great Society onto that. (For example, what came to be called AFDC was actually first included in FDR's Social Security Act). As a result of these policies, the US achieved its height of wealth and productivity from FDR to Reagan. Not a utopia, for sure, but much better. With Reagan, the US began reversing course. Bill Clinton then ended actual welfare and took the first steps to begin "reforming" away Social Security (starting with the disabled). By this point, labor unions had been neutered, and the US had already lost a significant number of jobs. All those dominos began falling, taking us to this hellishly uncertain time.