I looked it up. Looks like he were with 538 from 2008-2023.
So to answer your original question, “It’s from 538 while Nate was still there” but I couldn’t say how directly involved he was with the models that backed this image from 2016. My assumption is that he would have been fairly deeply involved in the models though.
Not much to tell. It’s a Star Wars character name @hotdogsladies@mastodon.social made up on the spot on a podcast years ago and has embedded itself in my head like a brain worm
I think in these situations it’s best to message the mods directly rather than the community.