Two caucuses represent the humanities in the US Congress.
 

Roster of Congressional Humanities Caucus Members
Rep. David Price (D-NC) and Rep. Thomas Petri (R-WI) currently chair the Congressional Humanities Caucus. The caucus was founded in 2004 to ensure the vitality of the humanities in American life and to provide a forum for Members of Congress to engage in the humanities in current public policy issues. Members of the caucus work together to strengthen the nation’s awareness of history, literature, languages, philosophy, ethics, religion, anthropology, government, linguistics, and other humanities disciplines.

FY 2011 Congressional Humanities Caucus Dear Colleague Letter [currently circulating] (pdf)

FY 2010 Congressional Humanities Caucus Conference Letter [September 29, 2009] (pdf) 

FY 2010 Congressional Humanities Caucus Dear Colleague Letter [April 3, 2009] (pdf)
 

Roster of Senate Cultural Caucus Members
Senator Michael Enzi (R-WY) is the current Chair of the Senate Cultural Caucus. The membership of this caucus represents advocates of both the arts and the humanities.