Peter Slevin is a Northwestern University professor and contributing writer to The New Yorker whose teaching and writing focuses on politics and social issues. He has reported from more than 50 countries and covered political campaigns and policy debates from one end of the country to the other. He spent a decade on The Washington Post's national staff. His ambitious study of Michelle Obama, published by Knopf and translated into several languages, was a finalist for the PEN America biography prize and was named one of the best biographies of the year by Booklist. At Northwestern, Mr. Slevin teaches seminars on political reporting and police-community relations, as well as a lecture course on the U.S. role in the world entitled “Dilemmas of American Power.”