Eight states have now voted to legalize and regulate marijuana for adult use, and 28 have approved comprehensive medical marijuana laws.
Read MoreA new Gallup poll shows support for making marijuana legal in the U.S. has reached a record high of 60%, up from 58% last year and 50% in 2011.
Read MoreA new poll released by the Pew Research Center shows a growing majority of Americans support ending marijuana prohibition.
Read MoreA new poll finds Colorado voters are still upbeat about their decision to regulate and tax marijuana for adult use, and few would support repealing Amendment 64, the legalization initiative approved in November 2012.
Read More"Marijuana in its natural form is one of the safest therapeutically active substances known to man. By any measure of rational analysis marijuana can be safely used within a supervised routine of medical care. ... It would be unreasonable, arbitrary and capricious for DEA to continue to stand between those sufferers and the benefits of this substance in light of the evidence in this record."