(CNN) - Bill Burton, senior strategist for Democratic super PAC Priorities USA, took to Twitter Thursday to deliver a swipe at Republican presidential candidate Michele Bachmann.
"If leading GOP candidate in IA says she would let the nation default – shouldn't the news be bigger than simply the size of her ad buy?" Burton, President Obama's former deputy White House press secretary, tweeted.
Rep. Michele Bachmann of Minnesota released her first ad of the 2012 election cycle in Iowa Thursday, in which she vowed to vote against an increase to the debt ceiling. Iowa holds the first-in-the-nation presidential caucuses, scheduled for February.
"I fought against the wasteful bailout, against the stimulus. I will not vote to increase the debt ceiling," Bachmann said in the ad.
President Obama and Congressional leaders are embroiled in negotiations over an agreement to raise the debt ceiling before August 2, to avoid a potential default.
Priorities USA, which launched in April to compete with outside Republican groups in the 2012 election, went up with their own ad last week accusing Republicans of opposing "economic reforms at every turn."
"We can't rebuild America if they tear down the middle class," the ad said.