and the sequester can be used to defund dea pot investigations. Yes he can.
Actually there is a more direct process to complete legalization by the executive branch.
The Controlled Substances Act also provides for a rulemaking process by which the United States Attorney General can reschedule cannabis administratively. These proceedings represent the only means of legalizing medical cannabis without an act of Congress. Rescheduling supporters have often cited the lengthy petition review process as a reason why cannabis is still illegal.[17] The first petition took 22 years to review, and the second took 7 years. In 2002, the Coalition for Rescheduling Cannabis filed a third petition.
The United States Code, under Section 811 of Title 21,[18] sets out a process by which cannabis could be administratively transferred to a less-restrictive category or removed from Controlled Substances Act regulation altogether. The Drug Enforcement Administration (DEA) evaluates petitions to reschedule cannabis. However, the Controlled Substances Act gives the Department of Health and Human Services (HHS), as successor agency of the Department of Health, Education, and Welfare, great power over rescheduling decisions.
After the DEA accepts the filing of a petition, the agency must request from the HHS Secretary "a scientific and medical evaluation, and his recommendations, as to whether such drug or other substance should be so controlled or removed as a controlled substance." The Secretary's findings on scientific and medical issues are binding on the DEA. The HHS Secretary can even unilaterally legalize cannabis: "f the Secretary recommends that a drug or other substance not be controlled, the Attorney General shall not control the drug or other substance." 21 U.S.C. § 811b.
http://en.wikipedia.org/wiki/Removal_of_cannabis_from_Schedule_I_of_the_Controlled_Substances_Act