Top adviser confirms Trump will never release his tax returns. What is he so afraid of?

http://www.dailykos.com/stories/2017/1/22/1623625/-Top-adviser-confirms-Trump-will-never-release-his-tax-returns-What-is-he-so-afraid-of
"Trump is really, really afraid of what we’d learn if he did that, so he seems to be abandoning all of the delaying and excuses he offered during the campaign in favor of a flat no that adds one more lie to his sizable pile of lies. It reopens the question of what he’s so afraid of, though, and where early in the campaign, a leading theory was that we’d find out how rich he wasn’t, now his possible debts to Russians and other likely violations of the emoluments clause are at the top of the list."