Who serves as the Secretary of Transportation?

The correct answer indicates that Ray LaHood served as the Secretary of Transportation, a role he held from January 2009 to January 2013 during the Obama administration. In this position, LaHood was responsible for overseeing the nation's transportation systems, including highways, railroads, aviation, and public transit. His tenure was marked by efforts to improve infrastructure and enhance safety standards.

The other individuals listed have served in different governmental roles: Kenneth Salazar was the Secretary of the Interior, Thomas Vilsack has served as Secretary of Agriculture, and Eric H. Holder, Jr. was the Attorney General. Each of these positions has distinct responsibilities that do not involve the transportation sector, emphasizing the unique role that LaHood played in managing transportation policies and initiatives within the federal government.