Ivanka Trump is going to be a huge deal in Washington. While a federal anti-nepotism law could prevent the 35-year-old from holding an official White House position after her father, Donald, assumes his role as the 45th president of the United States on January 20, “unofficially,” an Ivanka source reveals in the new issue of Us Weekly, “she will be Donald’s closest adviser.” Over the course of her father’s successful campaign, the husky-voiced Seventeen cover model turned Trump Organization executive evolved into his most trusted consultant. “He looks to Ivanka for advice and consultation on almost everything,” notes a close...