How did Thanksgiving become a national holiday? Although President Abraham Lincoln issued a proclamation in 1863, much of the grassroots campaign is tied to the tenacity of Sarah Josepha Hale, editor of Godey’s Lady’s Book (the most widely circulated magazine at the time) and author of “Mary Had a Little Lamb.” Author Mike Allegra, who wrote Sarah Gives Thanks, joins the show to discuss Hale’s efforts to establish Thanksgiving as a national holiday, as well as her abolitionist and charitable efforts. Learn more about his book, here.