Well, lets look at how easy it's going to be to get rid of recreational marijuana...........
People in CO have gotten used to having it legal, and there has been over a BILLION dollars in tax revenue since it was legal.
CO's tourism rates are steadily going up due to the 420 tourism.
Take all that away, and not only will the people be upset, but the state will lose money from not only taxes but in tourism as well, which can have a negative effect on business such as hotels and dining.
As far as people in this thread saying that marijuana leads to heroin and other hard drug use? Nope...............sorry..............anything you wouldn't do while you're sober you are very unlikely to do while you're stoned. Yes, marijuana has an effect on your perceptions (colors are brighter, sounds are clearer), as well as a physical effect (relaxation, pain relief, appetite stimulation), but it has almost zero effect on your inhibitions.
Alcohol on the other hand is the true gateway drug. Why? Alcohol has an effect that reduces your inhibitions, or, long story short, when you're drunk, you will do things you wouldn't do normally while sober. Ever hear of the person who went home with someone only to wake up the next morning and wonder what in the hell did they do? We've all heard about or done that one.
Just like the GOP is finding out about the ACA, when people are able to use it and find out it is beneficial for them, good luck in getting rid of it. Same here with marijuana, people have gotten used to it, businesses have sprung up because of it, and lots of tax money is being generated by it. And that's just in CO. Imagine what kind of money could be generated if it was legal all through the country.