What's the diff? McCain attacks Obama with Versionista

Every four years, citizens of the United States are treated to one of the most celebrated traditions of American democracy: watching egomaniacal politicians fling dung at each other to convince the general population that they are less wretched than their competitors. Although campaigning tactics have changed little over the years, the process has evolved as new technologies make it possible for presidential hopefuls to smear each other in exciting new ways.