When I travel in some foreign nations, my US drivers license is not valid nor is my US auto insurance. I could certainly obtain a car and drive it unlikely to be caught. Or I can pay a few dollars and get an international or country specific license for my situation. Is it not obvious that it is better that I get a license and insurance rather than drive illegally? And of course for Mr. Trump, the licenses being issued in California will also create a data base with names, photos and addresses for rounding up all those rapists and murderers when he is elected. /snark if you can't tell