Days after American Crossroads released an ad accusing former Secretary of State Hillary Clinton of participating in a “cover-up” with regards to the attack on the U.S. diplomatic mission in Benghazi, a Democratic SuperPAC has fired back with an ad blasting Crossroads’ co-founder Karl Rove.

The ad, produced by liberal SuperPAC American Bridge 21st Century, invokes Rove’s roles in building the case for the Iraq War and outing CIA agent Valerie Plame. Over news reports of various pundits and politicians criticizing Rove and typically threatening music, a narrator warns that “For more than a decade, Karl Rove has misled the American people on national security issues.”

“If Karl Rove couldn’t be trusted then,” the ad concludes, “why should he be trusted now?”

While it remains unclear whether or not American Crossroads or American Bridge will win this SuperPAC proxy battle, there is reason to believe that the Democratic group has the upper hand. Recent polling suggests that Americans are predisposed to side with Clinton over her Republican foes when it comes to Benghazi. And when it comes to electoral results, American Bridge — which spent over $6 million trying to defeat Mitt Romney in the 2012 election — blows Rove’s startlingly ineffective SuperPAC out of the water.