Should the US Continue Fighting the "War On Drugs" by Attacking the Supply?

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Since President Ronald Reagan initiated an all-out "war on drugs" in 1982, the United States has been spending tens and billions of dollars a year in an attempt to control the trafficking and use of illicit drugs. Most of those dollars have been used to support stricter drug enforcement. Current US Policy assumes that targeting the drug supply through aggressive law enforcement will deter drug use by making drugs scarcer, more expensive and more difficult to buy. Drug enforcement and overseas programs to halt foreign drug supplies continue to dominate spending. My question to you all here is that should the US continue fighting the "War On Drugs" and spend so much which can easily be spent somewhere else and for the better?