Party Leaders in the United States Congress, 1789-2012

This report Picture of Congressby the Congressional Research Service briefly describes current responsibilities and selection mechanisms for 15 House and Senate party leadership posts and provides tables with historical data, including service dates, party affiliation, and other information for each. Tables have been updated as of the report’s issuance date to reflect leadership changes. Although party divisions appeared almost from the First Congress, the formally structured party leadership organizations now taken for granted are a relatively modern development.

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