Responding to criticism from Hillary ClintonHillary Rodham ClintonFive big Trump narratives to watch NBC: Russia setting up dossier on Trump Chelsea Clinton attends Muslim solidarity rally in NYC MORE that he has been too critical of President Obama, Bernie SandersBernie SandersDrug importation from other countries will save dollars and lives Sanders: Trump a 'pathological liar' Buttigieg endorsed by ex-treasurer in DNC race MORE on Thursday night noted she once faced off with him in a presidential race.

"One of us ran against Barack ObamaBarack ObamaWhite House adds to report on Trump's Sunday golf game British Parliament members hold heated debate over Trump visit What Trump can learn from Reagan on Presidents' Day MORE,” he said at the Democratic primary debate in Wisconsin. “I was not that candidate."

ADVERTISEMENT
Sanders, a senator from Vermont, made the remark after Clinton called him out for criticizing Obama and saying he "failed the presidential leadership test."

"Calling the president weak, calling him a disappointment, calling several times that he should have a primary opponent when he ran for reelection in 2012," she said, "I think that goes further than saying 'we have our disagreements."'  

Clinton said that while she understands there are policy disagreements, the "personal assessments and charges" Sanders made were "particularly troubling." 

Sanders defended himself earlier in the debate, saying he had worked with Obama, and that a U.S. senator has the right to disagree with the president.

Updated at 11:21 p.m.