You bet!
Since about 17 of those 20 million are involved with marijuana, that seems to be the drug to focus on -- I say we increase the penaly to discourage use. You agree with THAT notion?
Not at all. The effects of marijuana use pose no serious threat to the user or to society. Therefore, marijuana use should not be criminalized. If anything, I'd rather the federal government focus on more pernicious drugs, like cocaine, heroin, and meth.