Why would Mitt Romney go on national television and declare, "I think we have good reason to believe that there's a bombshell in Donald Trump's taxes. Either he's not anywhere near as wealthy as he says he is, or he hasn't been paying the kind of taxes we would expect him to pay"? Since when does buttoned-down, white-bread Mitt Romney make audacious, provocative accusations? Romney's accusation might be a safe bet — if not to be verified, then to never be refuted. Just a few years ago, Trump refused to release un-redacted tax returns, even when it could help him...