Scott Brown: What's Mitt Rom ... er, Elizabeth Warren hiding?

BFFs, Scott Brown and Mitt Romney (Brian Snyder/Reuters) This is rich. Sen. Scott Brown immediately responded to Elizabeth Warren's release of four years of tax returns with an attack:

'Scott Brown's willingness to disclose six years of tax return information, as requested by the media, is a stark contrast to Elizabeth Warren's stonewalling,' said Brown's campaign manager, Jim Barnett. 'By refusing to release her tax returns for 2006 and 2007, she is clearly hiding something. What is in her tax returns during these years that Warren is so afraid voters might learn? In the interest of openness and transparency, Professor Warren has an obligation to release the same information that Scott Brown is making available.'

Um, remember who else is refusing to release decades worth of tax returns? Oh, yeah.

But Brown's 'very, very dear friend' Mitt Romney has refused to release more than two year's worth of his own tax returns. Brown endorsed Romney in 2010, before the former Massachusetts governor even got into the race.

So, we have to ask, does Brown think his very, very dear friend is "stonewalling" and "clearly hiding something"? He must be, right? Because that's just what it has to mean when a politician holds back on tax returns. So when is Brown going to demand that those tax returns be released?