Washington (CNN) Former Secretary of State Madeleine Albright said Sunday that she doesn't believe President Trump is a fascist but called him the "most undemocratic president in modern American history."

Though Trump doesn't fit Albright's definition of a fascist -- "a fascist leader is somebody who uses violence to achieve what he wants," she said -- she is "worried" about his attitude toward freedom of speech, Albright said on BBC's "The Andrew Marr Show."

"I do not think he is a fascist. I do think he is the most undemocratic president in modern American history. And that troubles me," Albright said.

"And by the way, it's not easy as a former diplomat to be in a foreign country and criticize one's own president. But I am concerned."

"I don't think President @realDonaldTrump is a fascist," says @madeleine, "I do think he's the most undemocratic president in modern American history." #marr pic.twitter.com/GwzaG7AMjC — The Andrew Marr Show (@MarrShow) July 1, 2018

Albright, who led the State Department under President Bill Clinton between 1997 and 2001, has publicly written that fascism and the "tendencies that lead towards fascism" pose a more serious threat today than any time since the end of the second world war. Albright also recently penned a book titled "Fascism: A Warning."

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