President-elect Donald Trump has nominated former Republican congressman Sean Duffy as the 20th Secretary of Transportation, acknowledging his public service and support for fiscal responsibility. Duffy, a former reality-TV star and congressman from Wisconsin, left the House in 2019 due to family health issues. He has been a Trump supporter, notably backing a controversial immigration ban in 2017. Duffy will replace Pete Buttigieg, and his confirmation is not expected to face significant opposition. The Secretary of Transportation oversees a large department with substantial funding and critical agencies.