<Table> United States Senate election in Texas, 2018 <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> ← 2012 </Td> <Td> November 6, 2018 </Td> <Td> 2024 → </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td_colspan="2"> <P> </P> <Table> <Tr> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th> Nominee </Th> <Td> Ted Cruz </Td> <Td> Beto O'Rourke </Td> <Td> </Td> </Tr> <Tr> <Th> Party </Th> <Td> Republican </Td> <Td> Democratic </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> Incumbent U.S. Senator <P> Ted Cruz Republican </P> </Td> <Td> <P> </P> </Td> </Tr> </Table> </Td> </Tr> </Table> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> ← 2012 </Td> <Td> November 6, 2018 </Td> <Td> 2024 → </Td> </Tr> </Table> </Td> </Tr>

Who are the two candidates running for senate in tx