I don't particularly care one way or another, but I find it unlikely since their is no precedent for making an illegal drug via the Controlled Substance Act of 1970 (particularly a drug that is listed in Schedule 1) as a legal drug somewhere down the tenure. A Schedule 1 drug is listed because:
(A) The drug or other substance has a high potential for abuse.
(B) The drug or other substance has no currently accepted medical use in treatment in the United States.
(C) There is a lack of accepted safety for use of the drug or other substance under medical supervision.
Nixon drafted that act to specifically make it very difficult for a Schedule 1 drug to ever be moved to another Schedule, nevertheless legalize laboratory testing or worse to remove it in it's entirety.