The best solution for the federal government at this point is probably to ignore CO and WA until one of the other 48 states faces marijuana-related crime with direct connections to CO and WA. If that happens, Hickenlooper and/or Inslee can be tried in a federal court for their role in the crime.
I do respect the 10th Amendment on this issue. CO and WA have a right to burden their welfare systems through legalizing pot just like the other 48 states have the right to rid themselves of pot. However, the federal government should deny any federal funding of welfare benefits to CO and WA unless they have or maintain drug testing for welfare recipients. (Ideally, the federal government would just quit funding welfare entirely, but this is the federal government.)
I'm not sure whom is more narcissistic, you or Hussein.
You really think you make the rain to fall, the sun to shine, and the earth to stand on.
How is the right to grow a God given plant without govt death squads murdering people in their homes considered welfare?