What happened

The 11 Democratic members of the Senate Banking Committee, led by ranking member Elizabeth Warren's caucus, sent a joint letter to Chair Tim Scott on September 23 asking him to convene a public hearing on prediction markets. NewsBTC first reported the letter Thursday. The Democrats framed the request as a matter of committee jurisdiction: if event contracts start referencing securities, corporate earnings or company-specific outcomes, the Banking Committee has an oversight role the CFTC cannot preempt on its own.

The letter arrived on the heels of a private meeting between Republican committee members and Kalshi chief executive Tarek Mansour. Scott, in his own readout, said the closed session covered innovation, retail-investor protection and the regulatory treatment of securities-linked products. The Democrats want that same conversation held in the open, on the record, and with witnesses beyond a single operator.

Why it matters

Prediction markets have spent the past year moving out of the political-betting niche and into contracts that look a lot like derivatives on traditional financial instruments. That's the pressure point. A Kalshi contract on the next non-farm payrolls print, on a Fed decision, or on whether a listed company beats earnings starts to resemble the kind of securities-linked exposure the SEC has historically claimed.

The CFTC has been the default regulator for event contracts under the Commodity Exchange Act, but the Democrats' letter is a clear signal that the Banking Committee, which oversees the SEC, is not going to cede the file. It's the first public jurisdictional shot from senior lawmakers since Kalshi began expanding its slate. For an industry that has leaned on regulatory ambiguity to grow, the shift from CFTC-only to a two-agency conversation is the real story.