Mitt Romney won a clean sweep Tuesday night, with victories in the District of Columbia, Maryland, and Wisconsin. It is the latter state I want to focus on, as it was the most important of the bunch (from a political standpoint), and caps off an interesting back-and-forth between Romney and Rick Santorum in the Great Lakes region.

Last week I commented that Santorum might have an angle on victory in Wisconsin because the rural vote could be larger there than in the previous Midwestern battles. That did not pan out. In fact, the rural vote was substantially reduced last night relative to the 2008 battle between Mike Huckabee and John McCain in Wisconsin.

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