Sean Patrick Duffy is an American politician, attorney, and former television personality who is serving as the 20th United States secretary of transportation since January 2025. Duffy previously served as the acting administrator of NASA from July to December 2025. A member of the Republican Party, he served as the U.S. representative for Wisconsin's seventh congressional district from 2011 to 2019 and the district attorney of Ashland County, Wisconsin from 2002 to 2010.