If you are pulled over while driving, you have already violated a traffic code (or some other code) that warrants the officer stopping you. Assuming that was all legitimate (but even if it isn't, you still need to comply and sort it out in court), he is well within his authority to ask for a driver's license. Driving is a privilege, not a right. Now if you want to debate being stopped while carrying a firearm and demanded to show identification, I'd be more inclined to agree with you. But if you are operating a motor vehicle you need to be able to prove you are licensed to operate it when stopped.

