Stata .DO and .DTA files from: John Aldrich, Michael Brady, Scott de Marchi, Ian McDonald, Brendan Nyhan, David Rohde, and Michael Tofias. "Party and Constituency in the U.S. Senate, 1933-2004" in Why Not Parties?, Nathan W. Monroe, Jason M. Roberts, and David Rhode, eds., University of Chicago Press, forthcoming. [ZIP]