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Jill Biden: Joe is wiser and he has learned a lot

Mika Brzezinski sat down with Dr. Jill Biden in May for a discussion on her new book "Where the Light Enters."
Image: Dr. Jill Biden took questions from reporters during a campaign stop at Jeffers Pond Elementary School, Prior Lake, Minn.
Dr. Jill Biden took questions from reporters during a campaign stop at Jeffers Pond Elementary School, Prior Lake, Minn.Anthony Souffle / Star Tribune via Getty Images file