WASHINGTON — First lady Jill Biden says she’s in a “work marriage” with her senior adviser Anthony Bernal, who can “make life hell” for White House staff with his “overbearing” persona, a new book reveals. The 72-year-old first lady, who regularly travels on behalf of her 81-year-old husband, relies heavily on Bernal, New York Times reporter Katie Rogers writes in “American Woman: The Transformation of the Modern First Lady, from Hillary Clinton to Jill Biden.” “Jill and Bernal are, as Jill puts it, in a ‘work marriage,’ but his reach extends beyond the East Wing,” according to the book, which...