Trainwreck in slow motion.

Joe Biden was asked on Thursday about his favorite historical figure who was not a president.

His answer stunned his Iowa audience.

Joe Biden: “I think my favorite historical figure — there is a couple of philosophers who I find understood human nature better than most people. But in terms of political figures, maybe my favorite political figure, it is a tough call, I would have to say it is those people who gave America hope. Made them believe in who we are. You said not a president. I would have to start off with Jefferson, even though he didn’t live up to it. He is the guy that wrote that incredible document.”

Thomas Jefferson, who was the first person Biden named, was the third president of the United States.

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Someone take this old man home.