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BILL HAMMONS' AMERICAN POLITICS GUIDE: TOTAL POLITICS

Partisan Voting Index for the 110th US Congress (2008 Election)



Cook Partisan Voting Index or PVI is a measure of how strongly an American Congressional District or state leans toward one major political party or another compared with the United States as a whole. It was developed in 1997 by Charlie Cook of the Cook Political Report, a nonpartisan political newsletter, working with Polidata, a political statistics analysis firm.

The index for each Congressional District or state is derived by averaging the district or state voting results from the prior two presidential elections (the 2000 and 2004 elections, in this case) and comparing them to the latest winning national Presidential election results (George W. Bush's 51.2% in 2004, in this case). A Congressional District or state's index indicates which party's Presidential candidate was more successful in that district or state, as well as the number of percentage points by which that district or state's results exceeded the national average. The index is formatted as a letter ("D" for Democrat or "R" for Republican) + a number. For example, Colorado's 2nd Congressional District had a PVI score of D+8 during the 2008 election because the two most recent Democratic Presidential candidates (Al Gore and John Kerry) received an average of 8 percentage points more votes in the 2nd District than George W. Bush's aforementioned 51.2% in 2004. Each PVI is rounded to the nearest whole number.

Click here for a list of all members of the United States Congress (all United States Representatives and Senators listed by State), with links to US Senators' information pages, as well as US Congressional Districts and their elected Representatives with nationalatlas.gov US House District Maps and District-by-District Partisan Voting Indices. Links to Congressional office websites included as well.









































































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