Disclaimer: Supplementary materials have been peer-reviewed but not copyedited.


Figure S1: More Aligned With District, House

Figure S2: Increasing Polarization in the House

Figure S3: Increasing Polarization in the Senate

Figure S4: Extremists are More Aligned In House

Figure S5: Extremists are More Aligned In Senate

Figure S6: Misaligned Senators Still Send Many Press Releases

Figure S7: Senators Regularly Credit Claim for Grants

Figure S8: Color and Full Names Version of Figure 1

Figure S9: Color and Full Names Version of Figure 2

Figure S10: Comparing Identified Dimensions Across Scaling Methods

Figure S11: Stable Home Styles: Position on Horizontal Axis in Figure 1

Figure S12: Stable Home Styles: Proportion Press Releases Position Taking

Figure S13: Stable Home Styles: Proportion Press Releases Credit Claiming

Figure S14: Stable Home Styles: Across Issue Stability

Figure S15: Stable Home Styles: Similar Changes in Styles Across Classes

Figure S16: Stable Home Styles: No Difference Across Classes in Attention to Each Topic

Figure S17: The Home Style, Constituency Correlation Remains within Strata of Similar Ideological Senators

Figure S18: Validating the Second Dimension

Figure S19: Relationship Between Local Issues and State Characteristics

Figure S20: Daily Imbalance in Attention to Iraq

Figure S21: Daily Imbalance in Attention to Immigration

Figure S22: Inference Approach to Imbalance

Table S1: Aligned Senators Articulate In Step Positions, Marginal Legislators Articulate Out of Step Positions

Table S2: Numerical Estimates: No Change Across Classes

Table S3: The Robust Relationship Between State Party Composition and Home Style

Table S4: Questions from NAES 2004 Survey Used to Measure Constituent Opinion

Table S5: Numerical Model Estimates, Figure 4

Table S6: Regional Issue Topics

Table S7: Numerical Model Estimates, Regional Issues and Marginality

Table S8: Salient Iraq Dates

Table S9: Numerical Estimates for Model Prediction Participation in Iraq Debates

Table S10: Pseudo Code for Variational Approximation

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