Semirelatedly: if you're in a major US metro, your library card (which, where I live, you get online and in real time) gets you the archives of a bunch of major newspapers, plus your local newspapers. The suburban Oak Park, IL take on Nazism pre-WW2 was wild to read (online, after a very brief search). If you haven't, I recommend taking the 10 minutes to figure out what you can search through your library system.