SACRAMENTO – Gov. Arnold Schwarzenegger yesterday spelled out a key concession he is demanding from Democrats before signing any resurrected legislation that would give illegal immigrants the ability to obtain driver licenses. "I've already made it very clear that it has to be a different color driver's license so it's very clear it says foreigner or immigrant," the Republican governor said. Schwarzenegger's demand for a different-colored license could be troublesome for Democrats who feel it is discriminatory. They have reluctantly explored less-visible ways to distinguish licenses, such as a different sequence of numbers, a code embedded in the magnetic strip...