<Tr> <Th> Party </Th> <Td> Independent </Td> <Td> </Td> </Tr> <Tr> <Th> Current seats </Th> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th> Seats up </Th> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td_colspan="2"> Races up in the 2018 general and 2017 special elections <P> Republican incumbent running Republican incumbent retiring Democratic incumbent running Independent incumbent running </P> No election * Democrats need a three seat net increase if the Independents keep their seats and continue to caucus with them, whereas Republicans can maintain their majority even if they lose two seats . </Td> </Tr>

Who are the republicans up for reelection in 2018