Partisan change in the Mountain West

During the 1980s partisanship in the Mountain West shifted dramatically toward the Republican Party. This change was the result of issue-based conversion rather than group mobilization. Specifically, we trace this surge to Reagan's transformation of the issues connected with the Republican Party. Previous discussions of issue-based conversion have assumed that this force influences all voters equally. One of the issues behind the Mountain West's changed partisanship follows this pattern: Individualism (or limiting government influence on the individual) was behind both the Mountain West surge (and decline) in Republicanism and the nationwide growth in that party. But the second issue did not follow this pattern: Abortion influenced the Mountain West selectively. We conclude that partisan change can be the result of uniform influence of issue change, but that it can also be the result of issue changes that influence different groups of voters differentially.An earlier version of this paper was presented at the 1992 annual meeting of the Midwest Political Science Association in Chicago.