The CFTC sues Arizona, Connecticut, and Illinois over their actions against prediction markets, saying it has the "exclusive" authority to regulate such markets (Alex Harring/CNBC)

Alex Harring / CNBC: The CFTC sues Arizona, Connecticut, and Illinois over their actions against prediction markets, saying it has the “exclusive” authority to regulate such markets — A federal commission on Wednesday announced lawsuits against three states over its ability to exclusively regulate prediction markets.