Trust me, there's going to be a lot more Nelson-DeSantis voters than Scott-Gillum.
Even though Nelson will not win these areas or come close, he should still be relatively strong on the Space Coast and in the Panhandle compared to your average Democrat. Basically think Mark Warner in VA-SEN 2014 being saved by him having residual strength in rural Virginia making up for disappointing NoVA numbers. These would be people who the only Democrat they would ever remotely consider voting for these days is Bill Nelson.
