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Bernie Sanders and Hillary Clinton just brawled in their feistiest debate yet
Hillary Clinton Bernie Sanders
Hillary Clinton Bernie Sanders

(Justin Sullivan/Getty Images)
Hillary Clinton and Bernie Sanders.

Bernie Sanders and Hillary Clinton spent much of Thursday's Democratic debate yelling over each other in front of a boisterous Brooklyn crowd during what was their most contentious debate yet.

So much so that, at one point, CNN moderator Wolf Blitzer had to tell them to play nice.

"If you're both screaming at each other, the viewers won't be able to hear either of you, so please don't talk over each other," he asked the candidates.

The Vermont senator and the former secretary of state did not pull any punches in what was the candidates' last major chance to leave an impression on Democratic voters ahead of Tuesday's New York primary.

Clinton is leading in the state, which she represented for eight years in the Senate, by nearly 14 points, according to the latest RealClearPolitics average of several recent polls.

The very opening of the debate produced fireworks, after Blitzer asked Sanders about a recent suggestion the Democratic candidate made about Clinton possibly not being "qualified" for the presidency.

Sanders said that "of course" Clinton has the experience to be president. But he added that he does "question her judgment" because she voted for the Iraq war and supported trade agreements.

"And I question her judgment about running super PACs that are collecting tens of millions of dollars from special interests, including Wall Street," Sanders said.

Clinton fired back, bringing up Sanders' interview with the New York Daily News, for which he was widely criticized.

"We have disagreements on policy, but if you go ahead and read Sen. Sanders' long interview with the New York Daily News, where he had problems answering questions about his core issues, breaking up the banks," she said.

She continued:

When asked, he could not explain how that would be done, and when asked about a number of foreign-policy issues, he could not answer about Afghanistan, Israel, counterterrorism unless he had a paper in front of him. I think you need to have the judgment on day one to be both president and commander in chief.

Sanders circled back to his attack over Clinton's vote for the Iraq war and the super PACs supporting her campaign.

Clinton responded, saying that attacking her for having super PACs is an attack on President Barack Obama as well.

Many in the crowd appeared to groan at the statement. It was the first example of a lively audience that expressed its collective opinion throughout the debate.

"You may not like the answer, but I'll tell you why," she said. "Obama had a super PAC, Obama took tens of millions from contributors. And he wasn't influenced."