Congress growing more partisan, index shows

WASHINGTON — Members of Congress are working across the aisle on legislation less often than they used to, according to a new measure that supports other assessments of increasing partisanship in Congress.

The Bipartisanship Index — created by former Sen. Richard Lugar and the McCourt School of Public Policy at Georgetown University — measures how often lawmakers co-sponsor bills authored by a member from the other party and how often they attract co-sponsors from the other party to their own legislation.

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