The billionaire owner of Golden Nugget Atlantic City says he will resign from his casino company if he is confirmed to become the U.S. ambassador to Italy and San Marino.Tilman Fertitta, in a March 16 letter to the U.S. Office of Government Ethics, wrote that he will resign as CEO of Fertitta Entertainment LLC if he is confirmed by the U.S. Senate to the ambassadorial post. Fertitta was noominated tyo the post by President Trump in December.