Bernie Sanders said Wednesday that Hillary Clinton was not "qualified" to be president, citing the fact that a super PAC supporting her campaign takes "tens of millions of dollars in special interest funds."
"She has been saying lately that I am 'not qualified' to be president. Well let me just say in response to Secretary Clinton: I don't believe that she is qualified if she is through her super PAC taking tens of millions of dollars in special interest funds," Sanders told supporters in Philadelphia.
PHOTOS: Bernie Sanders on the campaign trail
He also cited Wall Street donations Clinton's super PAC has received and her vote in support of the Iraq War as well as her position on trade.
The new, sharply aggressive tone in the race comes one day after Sanders picked up a win in Wisconsin, his sixth victory in the past seven contests. Both campaigns are gearing up for a brutal race in New York, the state Clinton represented as senator and where Sanders was born and raised before moving to Vermont. Even after her loss in Wisconsin, Clinton leads Sanders comfortably in the delegate race. Still, a loss in New York would raise questions about her campaign and why Sanders continues to trounce her in some states.
A Clinton spokesman on Twitter described Sanders' comments as a "new low" in the race.
In an interview earlier Wednesday, Clinton similarly questioned whether Sanders was qualified to serve as president.
"I think he hadn't done his homework and he'd been talking for more than a year about doing things that he obviously hadn't really studied or understood," Clinton told MSNBC's "Morning Joe," saying "that does raise a lot of questions."
"Really, what that goes to is for voters to ask themselves: 'Can he deliver what he's talking about,'" Clinton said.
Clinton's comments came after a New York Daily News interview in which Sanders' responses were widely criticized, particularly his inability to explain a key platform of his campaign: how he would break up the biggest banks.
Clinton and Sanders are set to face off in an April 14 debate, days before New York's voters head to the polls.
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