In her daily politics newsletter, “Letters from an American,” Boston College history professor Heather Cox Richardson offers her two million readers a historical perspective on the news along with a dose of common sense. She launched the newsletter during the 2019 impeachment crisis, and the strains on American democracy, laid bare by the January 6 insurrection, have been a constant theme of her work. In Richardson’s new book, “Democracy Awakening” she argues that today’s Republican politics have their roots in history, going back to the New Deal. We talk to her about her book and why everyone should be a student of history.