Hillary ClintonHillary Rodham ClintonTrump puts pressure on GOP Congress Poll: Former Sanders staffer gains steam in race to replace Xavier Becerra Michael Moore: Trump will ‘absolutely’ ban Muslims MORE criticized Bernie SandersBernie SandersSanders tangles with Trump’s Education pick over college costs Senators introduce dueling miners bills Overnight Finance: Price puts stock trading law in spotlight | Lingering questions on Trump biz plan | Sanders, Education pick tangle over college costs MORE's record on gun control Sunday, tying him to the recent massacre in Charleston and the National Rifle Association. 

"He voted for what we call the 'Charleston loophole,' " Clinton said at Sunday night's debate, referring to a provision that gun control advocates say would have prevented the suspect in the massacre that killed nine people in a historic black church from obtaining a gun.
 
"He has voted with the NRA, with the gun lobby, numerous times," Clinton said of Sanders, saying that he had also voted against gun violence research that could have saved lives.
 
Clinton said she was glad Sanders had reversed his position on the liability of gun manufacturers — done the day before the debate. In 2005, he voted for a bill that gave gun manufacturers legal immunity.
 
Sanders struggled to return Clinton's attacks, pointing out that he had a D-minus record with the NRA. He said in light of this record with the NRA, her attacks were "disingenuous."
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