<Tr> <Th> Arkansas </Th> <Td> R + 15 </Td> <Td> Rep </Td> <Td> Rep </Td> <Td> Rep </Td> <Td> Rep 4--0 </Td> <Td> </Td> <Td> </Td> <Td> Rep </Td> <Td> </Td> </Tr> <Tr> <Th> California </Th> <Td> D + 12 </Td> <Td> Dem </Td> <Td> Dem </Td> <Td> Dem </Td> <Td> Dem 39--14 </Td> <Td> </Td> <Td> </Td> <Td> Dem </Td> <Td> </Td> </Tr> <Tr> <Th> Colorado </Th> <Td> D + 1 </Td> <Td> Dem </Td> <Td> Split </Td> <Td> Split </Td> <Td> Rep 4--3 </Td> <Td> </Td> <Td> </Td> <Td> Split </Td> <Td> </Td> </Tr> <Tr> <Th> Connecticut </Th> <Td> D + 6 </Td> <Td> Dem </Td> <Td> Split </Td> <Td> Dem </Td> <Td> Dem 5--0 </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr>

Who in congress is up for reelection in 2018