On multiple occasions I have made reference to the Cook Partisan Voting Index (PVI) when speaking about Congressional districts. The Cook PVI measures the partisan leaning of the district compared to the nation as a whole.
I have taken that idea, and created a Majority In Mississippi PVI (what I will now refer to as MPI for Majority Partisan Index) which details the partisan voting measures of the 82 counties compared to the state as a whole.
To find the state’s partisan “average,” I averaged the results from the governor’s race in 2003 and 2007, and the presidential election in 2004 and 2008. Those four different races saw an average vote of 57-43 in favor of the Republicans. Therefore, 57 was the key number.
I then prepared a spreadsheet with the county results (for the Republican ticket) of those four elections. If they averaged, say, 60 percent for the GOP then they had a PVI of R+3. If they had a GOP average of 42, then they had a PVI of D+15.
Click here to view the spreadsheet with details on all counties
Please let me know if you find any errors in the post or the spreadsheet.
Some details: I rounded up if the final average came to .5 or higher, rounded down if it was less than .5. Also, if a third party candidate took a percentage of the vote I generally divided their vote evenly between the Republicans and Democrats. So if the final vote was 50-48 with two percent for a third party candidate, I simply made it 51-49. Not perfect but it works.