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A graphic shows the transition of representation among Orange County congressional districts. (Credit: Priya Krishnakumar / Los Angeles Times)
A graphic shows the transition of representation among Orange County congressional districts. (Credit: Priya Krishnakumar / Los Angeles Times)

Gil Cisneros defeated Republican Young Kim on Saturday in the last of Orange County’s undecided House races, giving Democrats a clean sweep of the state’s six most fiercely fought congressional contests and marking an epochal shift in a region long synonymous with political conservatism.

With Cisneros’ victory, Democrats will constitute the entirety of Orange County’s seven-member congressional delegation, the first time since the 1930s that the birthplace of Richard Nixon, home of John Wayne and spiritual center of the Republican Party will have no GOP representative in the House.

“Sitting back in the 1960s, I would never have believed this would happen,” said Stuart K. Spencer, a party strategist who spent more than half a century ushering Republicans, including President Reagan, into office.

But noting the extensive demographic and political changes that have taken place — especially over the last two decades — “it’s pretty understandable,” Spencer said.

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