 All he has to do is fill out another form, and he can vote. My wife is a green card, a non-resident alien, I think they call it, and she just hasn't filled out the paperwork. It's that simple. All you've got to do is follow the rules. People with green cards shouldn't try to just short-circuit the system. Just continue on in the system, fill out the last form, and get it done. So don't blame—that suit's fault is that the green card holder should not understand the rules.