Considering how vague I was I dont know how you can proclaim it not a federal issue.
Raich v Gonzalez is a specific case I would like to see him weigh in on. The federal government using the interstate commerce clause as authority to regulate marijuan that neither travels out of state or is sold is considered one od the worst decisions still standing and will be overturned eventually. I guarantee you Kavanaugh will not vote to overturn that.