Donald Trump criticizes Hillary Clinton's use of a private email server, and then again says the financial disclosure forms he released when becoming a candidate are better than income tax returns.
Hillary Clinton lays out the possible reasons why Donald Trump isn't releasing his tax returns.
From Politifact:
Donald Trump says he will release his income tax returns, against the advisement of his lawyers, once "she" (Hillary Clinton) releases the 33,000 emails that were deleted.
Clinton uses her response time to say, "What we're seeing here again is a bait-and-switch" tactic.