<Tr> <Th_colspan="2"> Elections </Th> </Tr> <Tr> <Th> Voting system </Th> <Td> First - past - the - post in most states; nonpartisan blanket primary with a majoritarian second round in 3 states . </Td> </Tr> <Tr> <Th> Last election </Th> <Td> November 8, 2016 </Td> </Tr> <Tr> <Th> Next election </Th> <Td> November 6, 2018 </Td> </Tr>

Are all 435 members of the house of representatives up for reelection at the same time