alt Hacker NewsThere are limits on the laws of a State when it involves inter-State commerce.
The US Supreme Court recognizes a general principle that you can transit a State with things that are illegal in that State. An individual State cannot impose a de facto ban on commerce between States, which includes the right to transport goods through a State in the normal fashion regardless of the laws of that State.
I'd be interested to know what case recognizes such a general principle. I would recommend not publicizing that you are transiting with cannabis from Oregon to Montana through Idaho, for example.