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2026 Compare Cities Politics & Voting:
Portland, OR vs Diamond Bar, CA

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Highlights
- Registered voters in Diamond Bar are 2.1% less likely to be registered as Democrats than registered voters in Portland.
- Registered voters in Portland, are 34.5% more likely to be registered as Democrats, than in the rest of the United States.
 Portland, ORDiamond Bar, CAUnited States
 Democrat  Unlock71.8%48.0%
 Republican17.0%  Unlock45.9%
 Independent Other  Unlock5.8%6.0%
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Learn More About Portland, Oregon
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Learn More About Diamond Bar, California
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