Barack Obama’s campaign got wind of oppo researcher Stephen Marks’ plans to air the “The Real Barack Obama” ad produced by his 527 group pH for America on five TV stations in the battleground states of PA and MI starting this week, because his “smear-fighting” Web site has launched an attack on the attack ad. Referring to him as a “career smear peddler,” a “trickster” and a “scam artist,” the Obama campaign does not mention Marks by name, but coyly links to an entry on SourceWatch instead.