Is resignation of current DEA head a very big moment for federal marijuana policy?

The question in the title of this post is prompted by a number of stories I have seen in the wake of yesterday’s news that Michele Leonhart is resigning as Administrator of the Drug Enforcement Administration.  Here are links to some of these stories:

• From Bloomberg here, “Marijuana Activists Cheer Michele Leonhart’s Exit from the DEA”

• From the Daily Caller here, “Marijuana Advocates Thrilled At DEA Administrator’s Expected Resignation”

• From The Hill here, “Marijuana advocates push for new pot-friendly DEA chief”

The last story linked here highlights what will really determine the answer to the question in the title of this post: if President Obama nominates somebody for this position who expresses openness to federal marijuana reforms and a serious commitment to a more public-health oriented approach to all drug enforcement issues (e.g., Dr. Sanjay Gupta?), the transition at the top of DEA could end up being a very big deal.