I know that there was a strong religious, anti-science aspect of the early populists. Progressives I associate more with Teddy Roosevelt...whose foreign policy was a bit, shall we say, aggressive. So I don't assume populist OR progressive guarantees good. But there is something appealing about both at their core. Each candidate is an individual and I have been comfortable with some pretty conservative candidates because I liked who they were and how they thought. Howard Dean and Bill Richardson are conservative on some issues, liberal on other issues...but their basic integrity, intelligence and populist approach (LISTENING to the voters) is appealing. Progressive and populist overlap a lot. But Gingrich was arguably populist, but NEVER progressive.