Answer
Bill Cassidy was elected to the U.S. House of Representatives from Louisiana's 6th Congressional District. He served in the House from 2009 to 2015, when he was elected to the U.S. Senate. The 6th Congressional District includes parts of Baton Rouge, as well as Ascension, East Baton Rouge, Iberville, Livingston, Pointe Coupee, St. Helena, St. James, and West Baton Rouge parishes.