A good example of unethical can be seen by reading Clinton's leaked Wall Street speeches where her private options is wildly different than her public.
Unethical that while the DNC is well within their right to push the candidate most likely to win, their public impression of fair voting was not at all that to Bernie supporters. Nor did the DNC disclose just how much the Clinton campaign was funding operations before her being selected as candidate.
Also unethical would be the private email server set up to push unecrypted backups to an unvetted third civilian party with no security access. Not to mention sending classified materials to Anthont Wiener's laptop, and generally mishandling classified info.
I'm not sure having media push the articles the campaign writes with the promise of greater access is ethical.
Was it ethical to fund a known phony dossier through Fusion GPS, the British, and Ukraine? IDK. Maybe that's "opposition research"... It's hard to tell where that line is.
... Unless you don't think those things happened.
edit: More downvotes, but all of those things happened. Sorry HN, seeming more like Reddit every day :(