the federal potus and crew seem to support both enforcing federal laws and respecting states rights.
at some point, potus and crew need to take a stand on which is more constitutionally important.
i think their concentration on federal laws that if violated pose a threat to the survival of the republic, then go strong for those.
if on the other hand, if a federal law does not pose a survival threat to the republic, then let those laws be decided by the individual states. 
also, does cannabis really need to still be classified as a schedule one drug? 
from a health prospective, if cannabis remains schedule one, then why does the government continue to subsidise and tolerate the production and consumption alcohol and tobacco "drugs".
potus and crew should work on the big problems to the republic and let the states deal with those that will not cause the republic to fail.
like FDR said at the end of alcohol prohibition (sort of paraphrasing), 'this would be a good time for a toke'.