Former Secretary of State Hillary Clinton and Sen. Bernie Sanders (I-Vermont) had a terse back-and-forth near the end of the Thursday-night Democratic presidential debate, during which Sanders accused Clinton of a "low blow."
Clinton took an opportunity to rip Sanders over his past criticism of President Barack Obama.
In an NBC interview that aired Thursday, Sanders took a slight dig at Obama for supposedly failing to close the "presidential leadership gap" between Congress and the American public.
Click through reactions of the Democratic debate:
"This is not the first time he has criticized President Obama," Clinton said.
"I don't think he gets the credit he deserves for being a president who got us out of that ditch, put us on firm ground, and sent us into the future," Clinton said, noting that Obama came into office in the midst of a deep recession. The comment earned Clinton one of the biggest applause lines of the night from the Milwaukee, Wisconsin, crowd.
"The kind of criticism we've heard from Sen. Sanders about our president, I expect from Republicans," she continued. "I do not expect from someone running for the Democratic nomination to succeed President Obama."
Sanders smiled as he was being attacked.
"Madam Secretary, that is a low blow," he said.
See more from the Thursday night debate:
He went on to tout his experience working with Obama and the president's economic record. But, he argued, a senator in a democratic society has a "right" to disagree with a president, even of his own party, once in a while.
Sanders said that he and Obama were "friends."
"I think it is really unfair to suggest that I have not been supportive of the president," he said. "I have been a strong ally with him on every issue."
He then turned to Clinton: "Have you ever disagreed with the president? I suspect you may have."
Clinton returned to her criticism of Sanders, accusing him of supporting calls for a 2012 primary opponent during Obama's reelection process.
"I think that goes further than saying, 'Hey, we have our disagreements,'" she said. "... Those kinds of personal assessments and charges are ones that I find particularly troubling."
Sanders returned with a scathing end to the back and forth.
"One of us ran against Barack Obama," he said. "I was not that candidate."