I saw this article in the LA Times:
How legalizing marijuana on Indian reservations could end the prohibition on pot - LA Times
and this one a few days later in Union Tribune that describes the history of marijuana restrictions http://www.utsandiego.com/news/2014/dec/25/marijuana-history/
I had no idea that President Nixon made it illegal in 1970. I thought it had always been illegal! This is another thing on the list of "evils" that Nixon was able to do while in office. Of course the Vietnam war was at the top of the list. However his making pot illegal, and listing it in the highest category ruined millions of lives since that time, contributed to destruction of the environment (for illegal pot farms) and increased the level of crime. Of course, the police, judges, prisons, DEA, FBI, Homeland Security, border patrol etc all made huge salaries from that decision.
Now, it appears that Indians will be allowed to grow it on their land! What a dramatic change!