Camden County from
My Name is Earl is almost definitely a Trump county. It's depicted as a poor area outside of a larger city which is mostly ignored by everyone else. However, it is not entirely rural, and has a good amount of suburban/exurban sprawl. It's also fairly diverse. It's never stated which state the county is in, but it's somewhere near Texas, was on the border of the Union and the Confederacy during the Civil War, and is pretty arid and prone to tornadoes. I can't think of any counties that match all those, but maybe a good analogue county would be Muskogee County, OK (66%-32% Trump)?
Twin Peaks would probably have supported Trump. However, modern Twin Peaks, as the 2017 revival indicated, seems to be attracting younger, hipster-like people to move there, so maybe Trump's performance ends up being narrower than it would be in the 1990's version of Twin Peaks.
Twin Peaks is described in the original series as being near the Idaho and Canadian borders, putting it in Pend Oreille County. It's also listed on its welcome sign as having a population of 51,201. So, the best comparison in the real world for a city of that size in that area is probably Coeur d'Alene, ID, which also matches the pattern of recent growth from outsiders moving in. I'm not sure exactly how Coeur d'Alene voted, but I'm pretty sure it was a clear Trump win.
However, if you put Twin Peaks where it was filmed and where the locations in the series actually are, it would almost certainly be a clear Biden win. In fact, there is a precinct honorarily named "Twin Peaks" in the Mt. Si/North Bend area, which voted 402-292 (56%-40%) for Biden, despite being mostly rural.
