If “presidential historian” seems like a dull vocation, you obviously missed Doris Kearns Goodwin retelling one of Abraham Lincoln’s outhouse jokes on The Colbert Report last fall. Her book, Team of Rivals, was the basis for Steven Spielberg’s Oscar-winning Lincoln, and she’s also written about Lyndon B. Johnson, Franklin and Eleanor Roosevelt and the Kennedys. Her new book about Theodore Roosevelt and William Howard Taft comes out in less than a month. The Pulitzer Prize winner speaks about the leadership lessons to be learned from Lincoln’s administration at a breakfast lecture for Whitworth University’s fall President’s Leadership Forum. Given the current dysfunction in Washington, D.C., we could definitely use some leadership tips — and some humor.