Portugal's drug legalization is a "resounding success". Would this work in America?

From this article talking about Portugal’s recent decriminalization of personal possession of drugs…

Decriminalization is dismissed out of hand by those that consider drugs a moral issue, but prohibitionists that stoop to debate argue decriminalization will bring a “parade of horrors.” Some of these are that usage and addiction rates will explode, more children will do drugs, and decriminalized areas will become drug tourist havens that will spread addiction throughout the world.

None of these things have occurred in Portugal. Instead a massive amount of financial resources have been freed up to provide treatment to those that want it. In addition, more of the population has been willing to take advantage of government-supplied treatment now that there is no fear of criminal ramifications.