Politico: Obama's campaign far more negative than Romney's

One would think that this should be obvious.  Has the Romney campaign ever called Obama a felon?  Implied that Obama was responsible for a woman's death?  Or have Republican Senators called Obama a tax cheat?  From Politico:

. . . Obama and his top campaign aides have engaged far more frequently in character attacks and personal insults than the Romney campaign. 

With a few exceptions, Romney has maintained that Obama is a bad president who has turned to desperate tactics to try to save himself. But Romney has not made the case that Obama is a bad person, nor made a sustained critique of his morality a central feature of his campaign. 

Obama, who first sprang to national attention with an appeal to civility, has made these kind of attacks central to his strategy. The argument, by implication from Obama and directly from his surrogates, is not merely that Romney is the wrong choice for president but that there is something fundamentally wrong with him. 

To make the case, Obama and his aides have used an arsenal of techniques — personal ridicule, suggestions of ethical misdeeds and aspersions against Romney’s patriotism — that many voters and commentators claim to abhor, even as the tactics have regularly proved effective. . . . .