My theory is that various geographic results in primaries can be linked to the television market.
In Missouri, the TV market map looks like
this.
But
the 2008 Gubernatorial primary map from Missouri shows us that Hulshof won the Columbia, Kirksville, and Hannibal markets easily. It also shows a few things that don't match the border lines in the dishuser map.
For one, Saline County which is in the KC market and in Ike Skelton's district, went 70/24 for Hulshof.
Other counties of note not in the three stronghold markets or Hulshof's district are..
The five counties in SW MO won by Hulshof were all in the Joplin media market. Hulshof also did very well in the Cape Girardeau market, including three counties that he has family ties to (he grew up in Scott County).
But Hulshof also won Carroll, Linn, and Pettis Counties, all listed as in the KC market, but bordering Columbia.
Marshall, Missouri (Saline County) is covered by Windjammer for Cable, which carries both KC and Columbia affiliates for the big 4. Sedalia (Pettis County) is covered by Charter Communications which only carries Columbia's ABC affiliate. Carrollton (Carroll County) doesn't appear to have any Columbia TV ties but might get Columbia radio. Brookfield (Linn County) is covered by Suddenlink Communications which has Columbia's NBC affiliate.
So... there are some imperfections in regards to Marketology. Especially since we're not privy to the county-by-county ratings for various television stations.