According to an unnamed source known to both Senate Majority Leader Harry Reid (D-NV) and CNN's Dana Bash, that's the case. And Reid is not backing down when Romney tells Hannity that he oughtta "put up or shut up," he's doubling down:
“It’s clear Romney is hiding something, and the American people deserve to know what it is. Whatever Romney’s hiding probably speaks volumes about how he would approach issues that directly impact middle-class families, like tax reform and the economy. When you are running for president, you should be an open book.The Dems are forcing Romney into a corner of his own making. Mitt keeps having to defend, primarily because whatever is in those taxes is obviously damaging to him, or else he'd release them. Since the wealthy live by different rules and have all the tax lawyers and tax accountants in the world to help them "preserve capital" it is not hard to imagine Mitt having skirted his civic duty, even if foolish for someone with designs on the White House.
This whole narrative has made it impossible for Mitt to carefully choreograph his introduction to the electorate - Obama For America has already introduced him to us all as Mr. Bain, destroyer of American businesses. Best of all for Barack, it plays right into Romney's policy choices, as demonstrated by this new, hard-hitting ad:
My only fear is that Romney is so weakened by the time the GOP Convention rolls around, they replace him with somebody who might actually win.