Trump only won Madison County by eight points, the narrowest margin since Reagan in 1980. Huntsville is about 60% of the population of Madison County, it's plausible that the city could've gone for Biden assuming that the surrounding areas are as deep-red as I assume that they are, although Huntsville also spills into neighboring Limestone County. The NASA presence (since the days of Operation Paperclip when they had Wernher von Braun there) also makes Madison County much more educated than its surroundings, although in the Deep South educated whites are still much redder than they are elsewhere. If the NYT map had Alabama filled in, I'd eyeball the rough shape of the city in the county to hazard a guess, but it seems a fairly even proposition as to whether or not Biden won it.
Pretty sure even Clinton won Huntsville.
