The The Controlled Substances Act of 1970 and the Supreme Court decision in Touby v. United States, 1991, are the legislative and legal foundation for the federal governments efforts against the abuse of drugs and other substances.
This is a conservative website and I am a conservative. If you don't agree with America's national drug control policy, work to get it changed. Just watch the inflammatory rhetoric.
Then I suppose that congress can pass a law that no one can carry or own a gun unless an employee of the government and that would be the law of the land. NOT
The legislative branch does not have unlimited power. Its powers are defined and limited by the constitution and if they violate it, they are no longer making laws, rather they are making waste paper.
Paraphrasing the first chief justice, John Jay: Any law that is in contradiction to the constitution imposes no obligations and provides no protections.
That means that a policeman that arrests you for violating these invalid laws is a kidnapper. Everyone else along the way, prosecutor, judge and prison guards are co-conspirators to the kidnapping and subsequent false imprisonment. Jurors have the ability to end it by nullifying bad law but if they convict, they too are part of the conspiracy though they have the defense of ignorance. The system does its best to keep jurors ignorant starting during their public school education.