<P> Trump vs. Warren </P> <Table> <Tr> <Th> Poll source </Th> <Th> Sample size </Th> <Th> Date (s) </Th> <Th> Margin of error </Th> <Td> Donald Trump </Td> <Td> Elizabeth Warren </Td> <Td> Undecided </Td> </Tr> <Tr> <Td> Zogby Analytics </Td> <Td> 402 </Td> <Td> August 17--23, 2017 </Td> <Td> ± 4.9% </Td> <Td> 47% </Td> <Td> 41% </Td> <Td> 13% </Td> </Tr> </Table> <Tr> <Th> Poll source </Th> <Th> Sample size </Th> <Th> Date (s) </Th> <Th> Margin of error </Th> <Td> Donald Trump </Td> <Td> Elizabeth Warren </Td> <Td> Undecided </Td> </Tr> <Tr> <Td> Zogby Analytics </Td> <Td> 402 </Td> <Td> August 17--23, 2017 </Td> <Td> ± 4.9% </Td> <Td> 47% </Td> <Td> 41% </Td> <Td> 13% </Td> </Tr>

Who is all running for president in 2020