I wish I had a good answer to this, because it is an excellent question. Just like every other state, the large cities largely vote Democrat, and the rural areas largely vote republican. This is nothing new. However, Florida is a really massive state and happens to have a lot of rural areas. Basically any open road is going to have random small communities right off of it. The population is so sprawled out and decentralized. And the Trump cult mentality has definitely taken over all of the rural areas. I'm sure a political scientist could describe this better.