<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> 603 </Td> <Td> August 17--23, 2017 </Td> <Td> ± 4.0% </Td> <Td> 45% </Td> <Td> 39% </Td> <Td> 17% </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> 603 </Td> <Td> August 17--23, 2017 </Td> <Td> ± 4.0% </Td> <Td> 45% </Td> <Td> 39% </Td> <Td> 17% </Td> </Tr>

Who is officially running for president in 2020