Good point. California gives DLs to illegals. California also auto-registers all new DL recipients to vote, so ID will do jack shit in California.
Why bother, right?
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Driver licenses are a state issue. If CA wants to give driver's licenses to people regardless of citizenship, then that is the state's right.
And enfranchisement is also a state issue. The federal constitution sets minimum requirements, but the states are free to allow even more people to vote. If California wanted to spread voting rights to all inhabitants, regardless of citizenship, then that would be their right. There would be no need to orchestrate some elaborate back door fraud.