I'm against federally funded treatment programs. If a state wants to set up a treatment program, that's well within their authority. I might or might not vote for or support one in my own state, but I don't have any business telling some other state they must or cannot do it. That's for the citizens of that state to decide.
I frequently do not agree with the laws that the citizens and legislatures of other states pass, but being a replican means I have to recognize that as long as it's not exercising a power explicitly enumerated and transferred to the federal government in the Constitution, it is within their authority to do it.
The problem is that rights are balanced by responsibility. If we are giving people the right to use certain substances then it stands to reason that addiction ought to be their responsibility. As it stands, that’s not the case.
Insofar as WA funds addiction clinics that are funded by Obamacare - what goes on in WA is federal concern. This is why Obamacare is a game changer. If people in Texas are funding treatment centres in WA - then people in Texas have a say as to whether they legalize pot.