Even the fact that he never pays Federal Tax, which would have sunk any other presidential candidate, seems not to impact Trump badly, although the polls show Hilary pushing ahead again. Many people hate the Federal government and its taxes, so they agree with Trump when he says he is smart. The difficulty for pollsters and pundits is that this election is not about the presidency; it is about Trump.
People are either voting for him or against him. If they vote against him they will vote for Hilary unless they waste their ballot on some third party no hoper. Hillary has about 25% of potential voters actually voting for her with enthusiasm. That cannot get her to the White House. Whether she does get back to her old home will depend on whether enough Trump haters want to stop him at any price. Hardly ideal for America whichever way it goes.