<Tr> <Th> show Polling organisation </Th> <Th> Last date of polling </Th> <Th> Source </Th> <Th> Lib </Th> <Th> PC </Th> <Th> NDP </Th> <Th> Gr </Th> <Th> Oth </Th> <Th> Polling type </Th> <Th> Sample size </Th> <Th> Margin of error </Th> </Tr> <Tr> <Td> Ipsos </Td> <Td> May 7, 2018 </Td> <Td> HTML </Td> <Td> 26 </Td> <Td> 40 </Td> <Td> 29 </Td> <Td> - </Td> <Td> 5 </Td> <Td> Online / telephone </Td> <Td> 1,197 </Td> <Td> ± 3.2% </Td> </Tr> <Tr> <Td> EKOS Research </Td> <Td> May 6, 2018 </Td> <Td> Twitter </Td> <Td> 24.4 </Td> <Td> 41.1 </Td> <Td> 25.6 </Td> <Td> 6.5 </Td> <Td> </Td> <Td> IVR </Td> <Td> 2,018 </Td> <Td> ± 2.2% </Td> </Tr> <Tr> <Td> Abacus Data </Td> <Td> May 6, 2018 </Td> <Td> HTML </Td> <Td> 29 </Td> <Td> 35 </Td> <Td> 29 </Td> <Td> 5 </Td> <Td> </Td> <Td> Online </Td> <Td> 1,755 </Td> <Td> ± 2.4% </Td> </Tr>

When does the writ period end in ontario