Wow. Just two days after Mitt Romney offered up his latest hypocrisy by attacking Obama for his response to the Libya riots on the very same day he said he would refrain from political attacks in light of 9/11, The Daily Beast exposes yet another one: Despite refusing to release any more than the last two years of his own tax returns, he apparently demanded that the candidates he was considering for VP submit 10 years of theirs.

TDB notes that “a knowledgable source,” presumably someone inside the Romney campaign, confirms that at least some of the VP picks were required to hand in 10 years of returns, including the eventual pick Paul Ryan.

Asked for a comment the Romney campaign said only, “We do not discuss the VP selection process.”

The Obama campaign immediately pounced on the news. “Mitt Romney needs to answer one question: if he needed ten years of returns to decide on a vice presidential candidate, don’t the American people need the same to make their choice for president?” asked Ben LaBolt, an Obama spokesman.

The Daily Beast notes that Romney himself handed over 23 years of tax returns without protest when he was being considered as John McCain’s running mate in 2008. In ’08 the latest tax year he disclosed would have been 2007. Which would suggest that Romney’s resistance to disclose anything prior to 2010 indicates there’s something untoward in either the 2008 or 2009 calendar years.

But of course, if the hacker group who claims to have stolen Romney’s tax records wasn’t bluffing (and if they don’t receive a million-dollar ransom from the Romney campaign) we may all see those records on September 28, whether Romney likes it or not.