- Without seeing full tax returns from later years, it's not possible to know if the IRS found Trump's loss claims legitimate
- In second debate, Trump failed to clear up the mystery surrounding his taxes
Edward J. McCaffery is Robert C. Packard trustee chair in law and a professor of law, economics and political science at the University of Southern California. He is the author of "Fair Not Flat: How to Make the Tax System Better and Simpler." The opinions expressed in this commentary are his.
(CNN)In the mad rush to analyze Donald Trump's stunning billion-dollar tax loss, virtually all commentators -- and the Trump campaign itself -- asserted that all was perfectly legal.