<Tr> <Td> Public Policy Polling </Td> <Td> July 21--24, 2011 </Td> <Td> 500 </Td> <Td> ± 4.4% </Td> <Td> 39% </Td> <Td> 32% </Td> <Td>--</Td> <Td> 29% </Td> </Tr> <Table> <Tr> <Th> Poll source </Th> <Th> Date (s) administered </Th> <Th> Sample size </Th> <Th> Margin of error </Th> <Th> Bill Bolling (R) </Th> <Th> Mark Warner (D) </Th> <Th> Other </Th> <Th> Undecided </Th> </Tr> <Tr> <Td> Quinnipiac </Td> <Td> November 8--12, 2012 </Td> <Td> 1,469 </Td> <Td> ± 2.6% </Td> <Td> 33% </Td> <Td> 53% </Td> <Td>--</Td> <Td> 15% </Td> </Tr> <Tr> <Td> Public Policy Polling </Td> <Td> August 16--19, 2012 </Td> <Td> 855 </Td> <Td> ± 3.4% </Td> <Td> 36% </Td> <Td> 50% </Td> <Td>--</Td> <Td> 14% </Td> </Tr> <Tr> <Td> Public Policy Polling </Td> <Td> July 5--8, 2012 </Td> <Td> 647 </Td> <Td> ± 3.9% </Td> <Td> 35% </Td> <Td> 49% </Td> <Td>--</Td> <Td> 16% </Td> </Tr> <Tr> <Td> Public Policy Polling </Td> <Td> April 26--29, 2012 </Td> <Td> 680 </Td> <Td> ± 3.8% </Td> <Td> 32% </Td> <Td> 53% </Td> <Td>--</Td> <Td> 14% </Td> </Tr> </Table> <Tr> <Th> Poll source </Th> <Th> Date (s) administered </Th> <Th> Sample size </Th> <Th> Margin of error </Th> <Th> Bill Bolling (R) </Th> <Th> Mark Warner (D) </Th> <Th> Other </Th> <Th> Undecided </Th> </Tr> <Tr> <Td> Quinnipiac </Td> <Td> November 8--12, 2012 </Td> <Td> 1,469 </Td> <Td> ± 2.6% </Td> <Td> 33% </Td> <Td> 53% </Td> <Td>--</Td> <Td> 15% </Td> </Tr>

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