US soldier fights CFTC involvement in alleged Polymarket insider case

NEW: A U.S. soldier accused of making more than $400,000 from an alleged insider Polymarket bet is opposing the CFTC's attempt to weigh in on his criminal case.
The dispute could become an important test of how prediction-market activity is treated when confidential government information is allegedly involved.
It also raises a broader question around whether event contracts should be regulated more like derivatives, gambling products, or something in between.