On the issue of Mitt Romney’s tax returns, my colleague George Will put it simply: “The cost of not releasing the returns are clear. Therefore, he must have calculated that there are higher costs in releasing them.”
The question is what could be in them that would be so damaging to the Romney campaign. Right now, the most popular theory is that Romney simply didn’t pay any federal taxes at all in 2009. As Joshua Green wrote, ” It’s possible that he suffered a large enough capital loss that, carried forward and coupled with his various offshore tax havens, he wound up paying no U.S. federal taxes at all in 2009.”