<Li> Far - left </Li> <Li> Centre - left </Li> <Tr> <Th> Centre </Th> </Tr> <Tr> <Td> <Ul> <Li> <Ul> <Li> Centre - left </Li> <Li> Radical center </Li> <Li> Centre - right </Li> </Ul> </Li> </Ul> </Td> </Tr>

When did the us have a two party system