(CNN) Former Vice President Joe Biden opened up about his lifelong struggle with stuttering on Wednesday, offering a rare lengthy and personal reflection on how it has affected him, even to this day.

Biden said at a CNN town hall Wednesday he "still occasionally, when I find myself really tired," catches himself stuttering.

"It has nothing to do with your intelligence quotient. It has nothing to do with your intellectual makeup," Biden said. He said he thinks "part of it's confidence" and that he has to "think in terms of not rushing."

"You have to break it up, because you get so nervous," he said.

Biden pointed to the Academy Award-winning movie "The King's Speech," which is about England's King George VI working to manage his stutter, and said he uses the same method depicted in the movie to mark up his own speeches to accommodate his stutter.

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