I think it’s really hard for them to imagine other people are not doing the thing they’re doing. Especially in this case. Apparently it’s easy to vote 9 times, and “if I’m doing it, then it would be stupid if Dems didn’t”.
So yeah, it’s always projection, because they just can’t imagine a world where others choose the morally right option.
I would say he has used his next nine votes prematurely, so not being able to vote the upcoming nine elections only seems fair.