I still struggle to see how Nelson loses in this environment, especially since he won by two landslides
He won two landslides against idiots. Scott is not an idiot, and has a lot more money than the two of them put together.
He's significantly more popular now than he was then.
and Democratic incumbents in other narrow Trump win states are running away with it. I won't dismiss it out of hand, but it is confusing.
Scott is a much, much better candidate than Jim Renacci or Matt Rosendale or whoever, and Nelson not as strong an incumbent as Tester (and probably Stabenow, though I'm less familiar with her).
Anyway, FAU is usually kinda junky but this poll is about where I think the race is at.