To what extent do members of Congress respond unequally to people in different economic situations? How does partisan control of the agenda change the way in which Senators respond to the poor? Using data from the 2004 National Annenberg Election Survey, and multiple roll call votes, I examine Senate responsiveness for the 107th through 111th Congresses. The results show consistent responsiveness toward upper income constituents. Moreover, Republicans are more responsive than Democrats to middle-income constituents in the 109th Congress, and a case study of the 107th Senate reveals that responsiveness toward the wealthy increases once Democrats take control of the chamber.