However, there are many jurisdictions that have legalized just cannabis. Seems pretty evident that one major group are proponents of cannabis legalization, and the other is not. No major group is a proponent of legalizing all drugs.
There is at least one city in the US where:
- prosecutors won't prosecute people for buying or selling drugs of any kind
- police won't arrest people for buying or selling drugs of any kind
- the government pays many buyers a monthly stipend, to do with as they wish
There's some restrictions on who can sell in which places, but that's enforced by private groups.
It is probably more accurate to say lots of liberals and conservatives want to legalize cannabis, and a non representative extreme contingent on both sides either want to decriminalize all drugs or continue to ban cannabis.