Its not there, but I didn't see where it says the federal government cannot set standards for forms of identification it accepts for various purposes.
1. Don't interfere in the states' rights to issue their own drivers' licenses.
2. Stop accepting a driver's license as a valid for of ID for Federal purposes (e.g., Customs/Immigration, airport security, etc.).
Case closed.
Oh -- and I'd add a #3, too . . . Any state that issues driver's licenses to illegal aliens cannot force other states to recognize these licenses. If you are a New York driver and you get pulled over in Wyoming, your New York license isn't valid.