The movement to end marijuana prohibition has made significant progress recently, but it could all be undone when the next president takes office in 2017.
When Hillary Clinton graduated from Wellesley College in 1969 -- where the future first lady and Secretary of State says she did not try marijuana -- only 12% of Americans wanted to legalize the drug.
Former president Bill Clinton spoke out in favor of letting states decide whether or not to legalize marijuana, pointing to "a lot of evidence" showing that medical marijuana can help patients with a wide range of symptoms.
The president of Mexico dubbed the drug war "failed policy," and hinted strongly that Mexico, the source of most of America's illegal drugs, could follow the U.S.'s lead on marijuana legalization.
Uruguayan President Jose Mujica has certainly gotten attention on the world stage since his country legalized marijuana commerce last week, and not all of it has been favorable.