Sorry for my slow reply, jaker. I was banned shortly after my last post, then I was on vacation right after that, and I do not look at imgflip when I'm on vacation.
You raise an interesting question, although my personal $0.02 is that MbS doesn't give a rat's rear who the president is. They've benefited greatly from their relationship with the US over the years, and likely view us as nothing more than useful idiots. I have no delusions that if push came to shove, they'd have any more favorable viewpoint of Trump than they do of feckless Dementia Joe.