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DW-NOMINATE for US Congress

Data on political ideology derived from roll call voting behavior in the U.S. Congress

Political Party Platforms

U.S. political party platforms through 2012

State of the Union Addresses

Complete text of State of the Union addresses from 1790 to 2016

Presidential Nomination Acceptance Speeches

Presidential nomination acceptance speeches

Supreme Court Justice Database

Personal and historical ideological data on US Supreme Court justices