<Tr> <Th> California 40 </Th> <Td> D + 33 </Td> <Td> Lucille Roybal - Allard </Td> <Td> Democratic </Td> <Td> 1992 </Td> <Td> Incumbent running . </Td> <Td> Rodolfo Barragan (Green) Lucille Roybal - Allard (Democratic) </Td> </Tr> <Tr> <Th> California 41 </Th> <Td> D + 12 </Td> <Td> Mark Takano </Td> <Td> Democratic </Td> <Td> 2012 </Td> <Td> Incumbent running . </Td> <Td> Aja Smith (Republican) Mark Takano (Democratic) </Td> </Tr> <Tr> <Th> California 42 </Th> <Td> R + 9 </Td> <Td> Ken Calvert </Td> <Td> Republican </Td> <Td> 1992 </Td> <Td> Incumbent running . </Td> <Td> Ken Calvert (Republican) Julia Peacock (Democratic) Norman Quintero (Democratic) Matt Woody (No party preference) </Td> </Tr> <Tr> <Th> California 43 </Th> <Td> D + 29 </Td> <Td> Maxine Waters </Td> <Td> Democratic </Td> <Td> 1990 </Td> <Td> Incumbent running . </Td> <Td> Frank DeMartini (Republican) Edwin Duterte (Republican) Omar Navarro (Republican) Maxine Waters (Democratic) Miguel Zuñiga (Green) </Td> </Tr>

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