Marijuana becoming legal for medicinal and recreational uses in all the US states under Trump administrations looks indefinite. DEA is under Attorney General who is under the president. So, the policies of the president will prevail.
Marijuana is not as safe as it was recently revealed by some studies. In fact, it has many disastrous effects on human health especially the pot. This new study has shaken the freshly built base of the drug.
Discovery of medicinal uses of cannabis is facing obstacles as scientists and researchers are not having a smooth supply of the drug. National Institute on Drug Abuse and Drug Enforcement Administration are not helpful.