Deport the illegals - all of them - AND their "anchor babies". Make english the official, and ONLY language used in government offices and government schools. Remove welfare from all immigrants and enforce the support agreements signed by their sponsors. Close the borders to illegals entirely. Quickly deport any new illegals. Make a second offense a ten year prison term - at hard labor.
BTW - and I'm a Libertarian. Open borders are a great idea - in the proper context. We have NOWHERE near the proper context now. To approach it, we'd have to completely stomp out any vestige of the welfare state. Then we'd need to repeal about 95% of the laws.
Until then, my previous prescription is mucho in order.