I think you're misunderstanding - I think the suggestion of a hit job is because of the timing of all this coming out.

His affairs have been going on for months or years, so much so that various places knew about it, did nothing to stop it, and didn't leak it.

I think it's a fair question to ask "why is this all coming out together now?" Nobody seems to know. In the absence of any other explanation, suggesting "hit job" isn't absurd.