<Tr> <Th> Poll source </Th> <Th> Date (s) administered </Th> <Th> Sample size </Th> <Th> Margin of error </Th> <Th> Ralph Northam </Th> <Th> Tom Perriello </Th> <Th> Other </Th> <Th> Undecided </Th> </Tr> <Tr> <Td> CSP Polling </Td> <Td> June 8--11, 2017 </Td> <Td> 1642 </Td> <Td> ± 2.1% </Td> <Td> 41% </Td> <Td> 46% </Td> <Td>--</Td> <Td> 13% </Td> </Tr> <Tr> <Td> Change Research </Td> <Td> June 8--10, 2017 </Td> <Td> 919 </Td> <Td> ± 3.1% </Td> <Td> 46% </Td> <Td> 54% </Td> <Td>--</Td> <Td>--</Td> </Tr> <Tr> <Td> Hampton University </Td> <Td> June 1--6, 2017 </Td> <Td> 750 </Td> <Td> ± 4.2% </Td> <Td> 21% </Td> <Td> 29% </Td> <Td>--</Td> <Td> 50% </Td> </Tr>

Who is running in the democratic primary 2017