Romney's 2010 tax return, when combined with his FEC disclosure, reveals red flags that raise serious tax compliance questions with respect to his possible tax minimization strategies in earlier years. The release in October of his 2011 return will at best act as a distraction from these questions.

So, what are the issues?

The first is Romney's Swiss bank account. Most presidential candidates don't think it appropriate to bet that the U.S. dollar will lose value by speculating in Swiss Francs, which is basically the rationale offered by the trustee of Romney's "blind" trust for opening this account. What's more, if you really want just to speculate on foreign currencies, you don't need a Swiss bank account to do so.

The Swiss bank account raises tax compliance questions, too.

News: Americans view Romney's campaign more unfavorably than Obama's