PVI breakdown by county

by: TonyAngelo

Thu Jul 08, 2010 at 12:37:29 PM CDT

In formulating a congressional district's PVI, the results of the last two presidential elections are used. But should that be what we use for formulating a county's PVI? The whole point of this exercise is to get a better idea of the partisan makeup of the state at a local level; in that case would the results of the last two gubernatorial elections be a better way to go? How about a hybrid of the two, using the last presidential election and the last gubernatorial election? What about Senate races, should those be included?

So for example, in Beltrami county the average Democratic vote share for 2008 and 2006 was 52.5% and the average Republican vote share was 43.4%, when you subtract the GOP average from the Democratic average you get 9.1, when you than subtract the PVI of the state as a whole (with this method it's 5) you get 4.1, for an hPVI of 4 (PVI is rounded to the nearest whole number).

Here are the top 5 most Democratic counties according to hPVI:

Here are the top five most GOP counties:

Keep in mind that the hPVI is telling you how Democratic or Republican a county is compared to the state as a whole. Since Minnesota itself has a hPVI of 5, a county with a -1 hPVI is 1 point more Republican than the state, but is still a baseline D+4 county.

Here's the complete list: