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2025 Compare Cities Politics & Voting:
San Diego, CA vs Mercer Island, WA

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Highlights
- Registered voters in Mercer Island are 24.1% more likely to be registered as Democrats than registered voters in San Diego.
- Registered voters in San Diego, are 14.7% more likely to be registered as Democrats, than in the rest of the United States.
 San Diego, CAMercer Island, WAUnited States
 Democrat  Unlock69.8%48.0%
 Republican36.6%  Unlock45.9%
 Independent Other  Unlock9.1%6.0%
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