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Roll-call votes may understate polarization in Congress, study finds
- March 23, 2026 at 9:10 PM
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For decades, scholars have estimated the ideology of members of Congress by analyzing roll-call votes, recorded tallies of each member's "yea-or-nay" on legislation. But a new study from the University of Chicago's Harris School of Public Policy finds this method is likely skewed by "protest voting"—suggesting that polarization in Congress may be even greater, and started even earlier, than researchers thought.
Originally published at Phys.org