“The existence of the grassroots groups was indispensable,” said David Meyer, a UC Irvine sociology professor and author of “The Politics of Protest: Social Movements in America.” Those groups, he said, looked at the 2016 results and concluded that “there’s a chance for doing something here, even in Orange County. For years, people thought that when you go beyond the Orange Curtain, abandon all hope if you’re a Democrat.”

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