It appears the race between Clinton and Trump may be narrowing a tad with concerns over Clinton's honesty and truthfulness and possible health issues not going away. Be that as it may, Clinton will continue to embarrass Trump over his failure to release his tax returns which he claims he can't do because the are under audit. The reality is that there is nothing to prevent Trump from releasing his unaudited returns.
But the bigger question is perhaps why should anyone be required/pressured to release their tax returns. I hold the view that this is a private matter between the person and the tax authority concerned and as long as they are in order that should be the end of it. Subject to that very important caveat I believe that privacy 'trumps' so called transparency every time.
I think that we in New Zealand have got it about right with all MPs required to disclose their assets the 'Register of Pecuniary and Other Specified Interests' . I think you can make the case for this to be extended to include all local body politicians as well. The Register appears to work tolerably well, notwithstanding the occasional lapse like when an MP forgets about $50k in a US Bank account, although I am somewhat surprised that Mr Peters doesn't disclose his interest in the Spencer Trust which would appear to contravene clause 5(1)(d) of Appendix B of Standing Orders ... but we need to cut the old guy some slack ... he's forgetting a fair bit nowdaze.