6th Democratic Debate: Bernie Sanders Attacks Hillary Clinton's Relationship With Henry Kissinger

PHOTO: Sen. Bernie Sanders | Henry Kissinger | Hillary ClintonPlayMorry Gash/AP Photo | John Lamparski/Getty Images
WATCH Sixth Democratic Presidential Debate In A Minute

After criticizing Hillary Clinton’s Iraq War vote at tonight's presidential Democratic debate in Milwaukee, Wisconsin, Bernie Sanders turned to attacking Clinton’s relationship with Henry Kissinger, whom Sanders called “one of the most destructive secretaries of state.”

“In her book and in this last debate, she talked about getting the approval or the support or the mentoring of Henry Kissinger,” Sanders said. “Now I find it rather amazing because I happen to believe that Henry Kissinger was one of the most destructive secretaries of state in the modern history of this country."

Sanders continued: "I'm proud to say that Henry Kissinger is not my friend. I will not take advice from Henry Kissinger.”

“Well, I know journalists have asked who you do listen to on foreign policy and we have yet to know who that is,” Clinton responded.

“Well, it ain't Henry Kissinger, that's for sure,” Sanders shot back.

Kissinger, now 92, served under Presidents Richard Nixon and Gerald Ford.

He also received the 1973 Nobel Peace Prize.

Speaking to reporters after the debate, Sanders campaign manager Jeff Weaver still wouldn’t say who advises the candidate on foreign policy but said, "we'll get you a list soon."

ABC News’ Mary Bruce contributed reporting.