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(California News Service) A common narrative suggests that deeply polarized American voters always support their party's candidates, but a new study suggests otherwise in certain circumstances.

Researchers from Sacramento State and San Diego State universities asked more than 900 partisan voters about housing and homelessness - then asked them to choose, in a hypothetical local election - between a candidate from their party who disagreed with their views, or one from the opposite party who is aligned with them on policy.

Sacramento State Associate Professor of Political Science Danielle Martin co-authored the study.

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"Overall, voters do support candidates from their own party - even when an opposite party candidate was closer to their views on one of those salient local issues," said Martin. "But we also found that about 40 percent defected from their party."

The study found that people with weak party loyalty were more likely to defect, as were people who are very invested in their policy position.

They also point out that in national and state-level races, people are much less likely to split their votes between parties.

Study co-author Professor of Public Policy and Administration Ted Lascher, also from Sacramento State, said the data show that voters are more flexible when an issue hits close to home.

"One of the implications is that somebody who's running, who's the out party, in terms of local party identification, may be able to win elections in city council and mayoral races," said Lascher, "if they choose the issue very carefully. Because voters will sometimes cross party lines on particular local issues."

San Diego State University Political Science Professor Brian Adams said this means that even though Democrats enjoy broad support in California, that support is more conditional than absolute in local races.

"A lot of this research suggests that if Republicans put forward candidates that actually agreed with some of the policy positions that Democratic voters have," said Adams, "at least some Democratic voters would be willing to switch."

About 96 percent of electoral contests in the U.S. are at the local level - for races such as the school board, the city council, and the county board of supervisors.

Support for this reporting was provided by the Carnegie Corporation of New York.