demands voters in this state and on tribal lands present a valid i.d. with a actual street address. while that may sound like it s no big deal to you, here on the standing rock reservation and tribal lands across north dakota, the law is seen as to have one purpose, keep native americans from growing. some reservations, you don t have street addresses. majority of them don t have house numbers. so what they ve been utilizing is a p.o. box. reporter: margaret landon, a native american voting rights advocate, says just weeks before november s election, some native americans, her husband included, are scrambling to get new i.d.s just to vote. he had no idea what his street address was. he had to call his county emergency coordinator to find out. so i got 3 1st avenue east is what they told me on the phone.