Top 12 Oregon Republican Election Years Since World War II (Based on Voter Registration Ratio Index)


These data include statewide Oregon Democratic and Republican registration data since World War II.

Half of the best Republican years were during the 40s and 50s. The other half were during the 90s and 00s.

The ratio of Democratic to Repbulican voters is one way to assess partisan strength.
The index measures the ratio of Democratic voters to Republican voters.

Index = 100*(Democratic Pct./Republican Pct.)

Source of data: Oregon Secretary of State

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