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Hillary Clinton's mentions of Henry Kissinger go beyond just one line she wrote in her book. In fact, they go back years. | Getty Clinton's Kissinger praise goes back years

Bernie Sanders needled Hillary Clinton Thursday night for writing in her book that she sought the approval and advice of former Secretary of State Henry Kissinger.

But Clinton's mentions of Kissinger go beyond just one line she wrote in her book. In fact, they go back years.

A week ago in a previous Democratic debate Clinton praised Kissinger and his tenure at the State Department: "I was very flattered when Henry Kissinger said I ran the State Department better — better than anybody had run it in a long time. So I have an idea of what it’s going to take to make our government work more efficiently."

In 2014 Clinton reviewed Kissinger's New World Order book and called him a "friend" whose counsel she has "relied on."

In 2009 the two former top State officials sat down in an interview with historian and journalist Jon Meacham. Clinton had nice things to say there too.

"Well, Henry's the expert on theory and doctrine. I'm someone who thinks that it could help provide a framework and direction and lessons from history," Clinton said.

It's been a two way street though. He's previously called her "effective at the State Department.

"I’ve known her for many years now, and I respect her intellect,” Kissinger said to USA Today in 2014. “And she ran the State Department in the most effective way that I’ve ever seen."