I'd like to take a hard line against illegal immigration, but since we've let it occur for so long, a big chunk of our economy now depends on illegal labor. Therefore, why not introduce a temporary worker's card? Maybe even something you can obtain at the border for a daily or weekly job? This would be limited to Mexico, and would at least give the US an idea of who's entering and leaving. Then ramp up patrol and deport those who are still not complying.
Giving illegals driver's licenses is a bad idea due because it would put them on equal footing in a lot of ways with legal citizens, not to mention create confusion regarding services and whatnot.
