Now I know what this comes down to. Mean old Republicans not only want to throw children out into the street and make old ladies eat catfood, they're heartless enough to deny illegal immigrants the right to drive. You know, to get to their jobs they shouldn't legally have.
I know, I know "They do the jobs no one else will do" Whatever. Save that argument for another time. The basic problem here is security. I mean, with a California DL and either a birth certificate or papers from Mexico (and you can buy these documents, forged, on the street) you can do a lot. Not only that, but DLs are used pretty much universally as de facto identification cards.
And something to remember:
Seven of the 19 suicide hijackers who killed 3,000 people on September 11 had driver's licenses or state ID cards issued by Virginia, which at that time did not require proof of "legal presence"... the right to be lawfully in the United States.
Do I think if the terrorists hadn't had those DLs, 9/11 wouldn't have happened? No, not really. But why the hell should we make it easy for them?