I was kind of taken back when Jim came out and made that statement about not being there if Biden won. NASA has had quite a lot of success and I would assume Biden would want to see the organization continue on under his leadership regardless of him having been a Republican congressman. I took Jim's statement to be as more that he couldn't work with a Democrat president than anything else. Has Biden opposed NASA plans and funding in the past? I don't get why he wouldn't have trust in maintaining the status quo at NASA.
I just found the whole announcement strange and off-putting and essentially saying I don't want to work for you. I can see Cabinet members being someone you want to personally choose but just never saw this as effecting who runs the space program. If he personally felt that he couldn't work under an Democrat president (who has said he wants to work with both parties for the sake of all Americans), I think the tactful and more respectful thing to have done would be to have said nothing and tendered his resignation at a later date. The timing to me seemed questionable despite all the bipartisan talk. I think he has done a good job and don't think it's been an easy one. While I think this back and forth has gone on for decades, maybe not to this extent, I think it's such an ugly reflection on America and really don't think it has a place in what should be a unified approach to space.