Responding to criticism from Hillary ClintonHillary Diane Rodham ClintonHillary Clinton to speak at Asian Americans and Pacific Islanders summit More than half of eligible Latinos voted in 2020, setting record Fox News signs Trey Gowdy, Dan Bongino for new shows MORE that he has been too critical of President Obama, Bernie SandersBernie SandersStudy: Early unemployment cutoff would cost 16M people 0B Machine Gun Kelly reveals how Bernie Sanders aided him in his relationship with Megan Fox Overnight Health Care: CDC approves Pfizer vaccine for adolescents aged 12-15 | House moderates signal concerns with Pelosi drug pricing bill | Panel blasts COVID-19 response MORE on Thursday night noted she once faced off with him in a presidential race.

"One of us ran against Barack ObamaBarack Hussein ObamaTop Democrat buys Funny Or Die Michelle Obama describes Barack's favorite movies: 'Everybody is sad, then they die' Obama calls on governments to 'do their part' in increasing global vaccine supply MORE,” he said at the Democratic primary debate in Wisconsin. “I was not that candidate."

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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.