The map appears to be delineated at the county level. My question is what exactly does the blue represent? Is the map showing which counties broke D v. R in the 2020 presidential election or is it representative of voter registration? Or something else? CA, AZ, WA, HI, NM, VT, MA, IL, RI, NH look correct. Maybe OR, NV, CT, NJ, GA, UT, FL and TX. But something looks off, especially in SD and MT (too much rural blue), CO (Denver red and Colorado Springs blue), and MS and SC (way too much blue).