Who still supports the war on drugs
Unions. Check who throws the most money in opposition to MMJ/Legalization bills in places like CO, WA, OR, CA, etc. Teachers/Sheriffs/Prison guard unions.
Most of the Dem opposition stems from this. The unions fund them, so they do what the unions say. That and it grows government power A LOT, so they aren't ideologically barred from supported the WOD.
Republicans who support the WOD are simply liberals of a different flavor. They are beholden to mostly by certain social cons who claim to be "conservative" while simultaneously being totally ok with the federal government telling people what they can and cannot do in the privacy of their owns homes.
Both sides are supported by the industry lobbies.