The thing, though, is that both of these 527s represent union groups — in the case of the larger group, local branches of the S.E.I.U. who consider Mr. Edwards the strongest candidate on health reform. So Mr. Obama’s attack raises a couple of questions.
First, does it make sense, in the current political and economic environment, for Democrats to lump unions in with corporate groups as examples of the special interests we need to stand up to?
Second, is Mr. Obama saying that if nominated, he’d be willing to run without support from labor 527s, which might be crucial to the Democrats? If not, how does he avoid having his own current words used against him by the Republican nominee?
Part of what happened here, I think, is that Mr. Obama, looking for a stick with which to beat an opponent who has lately acquired some momentum, either carelessly or cynically failed to think about how his rhetoric would affect the eventual ability of the Democratic nominee, whoever he or she is, to campaign effectively. In this sense, his latest gambit resembles his previous echoing of G.O.P. talking points on Social Security.