Yeah, that poll/graphic/headline makes no sense. It's got Oklahoma, the most conservative place on the face of the earth, as 'leaning dem'.
I think the explanation might be that w.va, oklahoma, and the old confederacy all have strong local 'democratic' parties at the state level, which are fairly conservative (not as conservative as the local republican parties!) and popular, but are far from the us dem mainstream. And this poll analysis was about party affiliation.
People right now are waaaay overstating the degree of repub collapse. It is dangerous. They are by no means whipped. Progressive triumphalism be damned. Frankly, I think as far as the voting population of this country goes, it is still a basically center-right populace, at least in comparison to the rest of the industrialized world. We have yet to move the middle decisively leftwards, in even the slightest degree. Everything is still to be done.