You could probably build a coalition in favour of replacing any number of individual policies of "the war on drugs" with "better" policies. It's much, much harder to build one to broadly legalise drugs.
The two problems are that drugs are much too ingrained in society as something incredibly dangerous and that sound-byte politics don't lend itself well to the distinction of wanting an activity to be not prohibited without actually endorsing the activity itself.
The two problems are that drugs are much too ingrained in society as something incredibly dangerous and that sound-byte politics don't lend itself well to the distinction of wanting an activity to be not prohibited without actually endorsing the activity itself.