The FDR New Dealer who launched the “War on Drugs.” But that’s big government for you.
Drugs are supposed to be an issue left to the states. That is the constitutional position in our estimation. The prohibitionists had to pass an amendment to outlaw booze. Other drugs were basically declared illegal federally by an overreaching Roosevelt administration in the 1930s by fiat. The Feds knew they couldn’t pass an amendment so they just imposed cannabis prohibition. This of course expanded the power of the federal government and gave the government an excuse to poke around in everything like it had during alcohol prohibition.