<Table> <Tr> <Th> Poll source </Th> <Th> Sample size </Th> <Th> Date (s) </Th> <Th> Margin of error </Th> <Td> Mike Pence </Td> <Td> Democratic candidate </Td> <Td> Undecided </Td> </Tr> <Tr> <Td> Opinion Savvy </Td> <Td> 762 </Td> <Td> August 16--17, 2017 </Td> <Td> ± 3.5% </Td> <Td> 40% </Td> <Td> 52% </Td> <Td> 8% </Td> </Tr> </Table> <Tr> <Th> Poll source </Th> <Th> Sample size </Th> <Th> Date (s) </Th> <Th> Margin of error </Th> <Td> Mike Pence </Td> <Td> Democratic candidate </Td> <Td> Undecided </Td> </Tr> <Tr> <Td> Opinion Savvy </Td> <Td> 762 </Td> <Td> August 16--17, 2017 </Td> <Td> ± 3.5% </Td> <Td> 40% </Td> <Td> 52% </Td> <Td> 8% </Td> </Tr> <Dl> <Dt> Trump vs. Zuckerberg </Dt> </Dl>

Who will run for the next presidential election