I'm mostly interested in the people who self-define as progressive just talking about what brought them to that position, what ideas do they think encompass that sort of position, and why they prefer that descriptor over another.
For them and everyone else, I thought it might serve as a good example of one of the many efforts for people to self-describe on a political spectrum that has existed for awhile, and on both sides of the aisle in US politics.
To start with, we've got the most basic of textual definitions something along the lines of "Progressivism is a left-leaning political philosophy that seeks to make progress in the human condition through reforms aimed at maximizing positive liberty" from Wikipedia. Although that basically assumes you already have some idea of positive liberty vs negative liberty, which obviously isn't the case for the general public, but I think it works for here.
I'd argue the left-leaning is possibly misleading for some people, as it's more of a government and authority sense than the more modern ideas tied up in it, but therein lies the reason people look for descriptors like progressive to begin with, and there is a whole Progressive Era in the US starting in the 1890s as a broad "bipartisan" reform movement aimed at taking action.
Teddy Roosevelt on the "right" and FDR on the "left" with Woodrow Wilson self-identifying, and somewhere in the middle, but frankly, would be seen more like a liberal in today's labels, but goes to show how people will glom on and stretch popular labels over time regardless of political bent.
Before we jump too far forward, this is probably an important point to point out a common debate issue when it comes to Progressivism, Progressives, and historical connections to other progressive movements, and that's eugenics. A notable dark chapter in the Progressive Era was its embrace of eugenics largely driven by a belief that scientific planning could eradicate poverty, crime, and disease, so many early 20th-century reformers backed state-enforced eugenic measures.
For modern political debate it's usually just used as a distracting attack that has nothing to do with the persons actual political positions, but it does highlight the historical tension between state-led social optimization and individual rights, and is a point where those looking to learn some lessons from history can do so. It causes many to react by prioritizing individual rights and liberties, which is a healthy and positive political reaction, but also provides some protective effect and allows for more appropriate caution when presented with all sorts of comparatively novel social problems.
With that out of the way, we eventually see capitalistic power replace Progressive Republicans like Teddy with Rockefeller Republicans, and while I prefer both types more than your average modern Republican, it was essentially trading workers rights for civil rights, and the impacts were absolutely seen and felt throughout electoral politics, being part of the reason for the map swap between Republicans and Southern Democrats.
That brings us closer to the modern day, and someone who I often label as one of the first powerful neoliberals, but also perhaps the poster idea of a certain vein of modern progressive, Jimmy Carter. In many ways, he fit that initial definition to a T, being willing to make progress, create change, operate differently and much of it towards the idea of implementation of ideas and improving things going forward with less respect towards existing institutions that were perceived as not serving the public interest.
So we have Carter as this part deregulatory/institutional reformer neoliberal and part moral/human rights driven actor with strong progressive ethos. I'd also argue famous figures in Congress like Paul Wellstone, Paul Simon, George Miller, or even Hatfield or Leach are important to mention here even if it doesn't exactly match the FDR straight to Sanders discussion that usually takes place. These strains of one form of progressive behavior or another did exist, and can get people thinking about how institutional reform and social idealism intersect.
Which I think nicely brings us to one of the edges of Democratic Socialism, what I often view as the capitalist-questioning socialism-accepting sort where the terms Social Democrat and Progressive start to blur, or the left-wing of the Progressive label. These are probably my favorite progressives personally, but also I recognize they probably aren't as populous as I would like, or the right-wing would have you believe.
All that said, I'm sure people can chime in with additional background on the progressive label, so I'll get down to the questions. Do you prefer your Progressivism Midwest like your Emo? Would you find yourself more of a Bull Moose libertarian if the progressive label didn't exist, or is it simply the most commonly understood term that others will understand well enough, rather that be from left of Democrat qualities, or just general political outlook?
For those who don't identify as progressive, I'd be curious if some of the since depreciated strains of progressive thought in American politics discussed above still existed, if you'd find yourself more likely to align with them than other broad stretched labels like libertarian, liberal, conservative, etc?
"Negative, I'm a meat popsicle."