Wen Raiti, a Chinese American community leader in Jacksonville, Florida, has been a Republican for more than a decade. As a small business owner, she said, the party’s fiscal conservatism and small government ethos resonated with her. But last May, when Gov. Ron DeSantis signed legislation banning Chinese citizens from buying property in Florida, Raiti changed her party affiliation and began campaigning for local and national Democratic candidates. Leading up to Florida’s Aug. 20 primary election, anger toward Senate Bill 264 has turbocharged voter mobilization efforts in the Chinese American community in the state, organizers and elected officials said, pushing...