Schedule I drug

Dr. Rahul Gupta, director of the Office of National Drug Control Policy, talks about the changes in marijuana science over the past half-century.

Rep. Vern Buchanan of Sarasota introduced legislation that would permanently classify fentanyl-related substances as Schedule I drugs.

U.S. enforcement officials said they will not change how they treat marijuana under federal drug control laws, turning aside a bid from Democratic governors to loosen restrictions on the substance.