It is time to end the federal prohibition of marijuana. President Obama can take us 90% of the way there without Congress. By executive order he can reschedule marijuana under the Controlled Substances Act from a schedule 1 to schedule 4 substance.
Schedule I substances: have a high potential for abuse. Have no currently accepted medical use in treatment in the US. There is a lack of accepted safety for use of the drug or other substance under medical supervision. Marijuana does not meet this description
Schedule 4: Has a low potential for abuse relative to schedule 3 substances. Has a currently accepted medical use in treatment in the US. Abuse of the substance may lead to limited physical dependence or psychological dependence relative to schedule 3 substances. Marijuana qualifies.