The U.S. Supreme Court seems likely to issue a closely divided opinion in the case of a trucker fired after taking what he claims was a deceptively advertised CBD product, which turns on the scope of a 1970 statute most famously used in mob trials.

During a lively oral argument Tuesday morning, the justices appeared narrowly split about whether plaintiff Douglas Horn can use the federal Racketeer Influenced and Corrupt Organization Act to sue the cannabis companies behind a cannabidiol tincture sold under the name Dixie X.