Your legal immigrants replaced the native voters of California, and now they own it, why do you think the left assumes they will own Texas? Do you think it is because of some voters from the 1960s?
Do you really not know how immigrants vote? Are you under the impression that traditional Americans are the ones supporting the democrat party?
What do you think people are talking about when they talk about the conservative and republican voters being out numbered by immigrants and their offspring?
Our culture in the US changed and it brought about entitlement focused voters. Kids being abandoned by dad and moms having babies for government checks. That started in about 1964 or 1965. Add 20 years to that and you have another generation of DEM voters. Likely a 5 - 6 fold increase from that one group. They too helped the DEMs they too changed Cali's political landscape. If every illegal left tomorrow morning Cali would likely still be a DEM state. The ideals of it were taught in homes and the classrooms. It wasn't just immigration that did it.