Party Pressure and Representation

I study how political parties affect representation in the U.S. House. To do so, I account for party pressure on the votes of members in an otherwise standard spatial model that uses roll call voting patterns to identify member ideologies. I simultaneously estimate voter ideologies from survey responses, leveraging their responses on issues before Congress to bridge voters and members into the same ideological space. I find that, relative to a model without party pressure, member ideologies and those of their constituents are much more closely aligned. The results imply that, in terms of actual votes, parties drive a wedge between members and those they represent. I provide evidence that parties do so strategically, balancing the need for legislative wins and the electoral concerns of their members.