Hillary Clinton called Sen. Bernie Sanders (I-Vt.) out on Monday for what she described as an increasingly combative tone in the lead up to the Iowa caucuses.
"That's been the trend the last few weeks," the former secretary of state told "CBS This Morning." "The Sanders campaign has gotten more negative and more personal, which I regret because I thought we were running a really good campaign based on the issues."
Sanders dubbed Clinton's State Department email fiasco a "very serious issue" on several Sunday shows, specifying that just because he previously said he was "sick and tired of hearing about [her] damn emails" doesn't mean he thinks she did nothing wrong.
He did try to downplay his negativity, assuring NBC's Chuck Todd that "I am not going to attack Hillary Clinton." Instead, he said, "the American people will have to make that judgment."
"There is a legal process taking place, I do not want to politicize that issue. It is not my style," he added on CNN's "State of the Union."
Sanders also released an ad over the weekend accusing Clinton of being "in the pocket of Wall Street."
"Anybody who knows me knows I'm not in the pocket of anyone," she responded on "CBS This Morning." "Anyone who thinks they can influence me certainly doesn't know me."
Clinton added that she is "really pumped up and enthusiastic" about her campaigning efforts in Iowa, noting her team knocked on 125,000 doors over the weekend. The Iowa caucuses will be held on Monday night.
"We do really want everyone to come out and be part of this, because this only comes once," she said.