After over five years of running for the GOP presidential nomination, former Massachusetts Governor Mitt Romney shouldn't have anything left to hide, but he apparently does. Mr. Romney is refusing to release his tax returns despite the fact that his vast wealth is already well known and he has admitted that his significant annual income is taxed at around the 15% level. So why not just release the returns? When challenged on the issue during the most recent GOP debate, Governor Romney stumbled through his response eventually saying he would "probably" release the documents around April. But 24 hours later...