Re: 6 - for the questionable and in some cases bad hiring decisions made by President Trump during his first term, those are hopefully the sorts of questions that are asked of him during the Republican Primaries for ‘24.
I believe his daughter and son-in-law did him no favors in that area. But ultimately the buck stops with President Trump.
I don’t think his personnel failures will be any better; he hasn’t learned from the mistakes he made while in office.
Oz. Hershel Walker. Kevin McCarthy. Spectacularly terrible candidates. He seems to go with the most attractive and/or famous person. Sometimes it works; sometimes it doesn’t.