"Until he releases additional years of tax returns, the American people won't know why he kept his finances offshore in the Cayman Islands and set up a shell corporation in Bermuda," emailed Ben LaBolt, Obama's campaign press secretary. "Romney would be the first nominee in decades to release only one full year of tax returns. He recently said that his campaign has “put out as much as we’re going to put out” -– which makes you wonder: What is Mitt Romney hiding?"