It is being legalized at the state level. It was the 2016 election that several states had propositions to legalize recreational use. If I remember correctly, I am pretty sure it was a FOX news update that showed the map with a little pot leaf stamped on all the states that had legalized marijuana after the last election. However, most people haven't noticed it because the measure still had to be implemented in such as way that marijuana became a saleable item. Legalizing marijuana doesn't mean that you could just buy from your local dealer in many cases.
So, in theory, all 50 states could legalize marijuana by the year 2024. However, you would still have the Federal government saying it was illegal, and we can't vote on a federal law the way we can vote on many of our state laws. We should definitely get rid of the Federal government simply because of this fact that there is no democratic process for laws that exist at the federal level.
Although, if more and more states legalize marijuana, I would still imagine that the Federal law will just become something archaic that no one removes, but that they can't enforce unless we are placed under Marshall law, which is another reason to move everything back to the state level, but good for Canada. Although, this seems like a very delayed response considering BC bud culture has been a thing for a loong time now.
"Thirty states and the District of Columbia currently have laws broadly legalizing marijuana in some form.
Eight states and the District of Columbia have adopted the most expansive laws legalizing marijuana for recreational use. Most recently, sales of recreational-use marijuana in California kicked off on Jan. 1. In Massachusetts, retail sales of cannabis are expected to start later this year in July. Voters in Maine similarly approved a ballot measure legalizing marijuana in 2016. The state, however, has not yet adopted rules for licensed marijuana growers or retailers, nor has it begun accepting licenses. Gov. Paul LePage vetoed a bill that would have established a legal framework for sales of the drug."
http://www.governing.com/gov-data/state-marijuana-laws-map-medical-recreational.html