What is he hiding?

(CNN)Donald Trump continues to resist calls to release his tax returns.

The presumptive Republican nominee told The Associated Press in an interview Tuesday "there's nothing to learn from them."

Trump's resistance to releasing his tax returns leaves major questions for voters weighing a candidate who has staked his campaign on his business acumen and the fact that he is "very, very rich" and would mark a major break with decades of precedent set by the nominees of the two major political parties.

"He still leaves himself this out by saying if this audit wraps up before the November election, then sure he'll release his tax returns," said Julie Pace, one of the AP reporters who interviewed him, on CNN's "At This Hour." "We said, 'Will you push your lawyers on this, will you tell them that voters deserve to know this information regardless of the audit?' He said, 'No.' He said, 'One, the voters don't actually care about this, and two, there is no new l information that would come out of the tax returns.' "  (Continues)