2026 Membership Book FINAL

Case 1:25-cv-12578-RGS Document 1 Filed 09/15/25 Page 14 of 28

Kalshi’s customers or indirectly to Kalshi from Robinhood’s customers—are subject to the

CFTC’s exclusive jurisdiction, and Massachusetts law is preempted to the extent it purports to

regulate those transactions.

39.

The Constitution and laws of the United States “shall be the supreme Law

of the Land,” U.S. Const. art. VI, cl. 2, and accordingly, “Congress has the power to preempt

state law.” Crosby v. Nat. Foreign Trade Council , 530 U.S. 363, 372 (2000). Federal law can

preempt state law expressly, through a statement to that effect in the statute itself, or impliedly,

through either field preemption or conflict preemption. Field preemption exists where Congress

manifests an intent to occupy exclusively an entire field of regulation. See Fidelity Fed. Sav. &

Loan Ass’n v. De la Cuesta , 458 U.S. 141, 153 (1982). Conflict preemption exists where

compliance with federal and state law is “a physical impossibility” or when “state law stands as

an obstacle to the accomplishment and execution of the full purposes and objectives of

Congress.” Id. (internal quotation omitted).

40.

The statutory language of the CEA, its legislative history and the

comprehensive regulatory framework it sets out demonstrate that Congress deliberately

preempted state law. Whether analyzed as express or implied preemption, the scope of

preemption is the field of commodity futures and swaps trading, including event contract trading,

on CFTC-designated exchanges.

41.

The CEA provides expressly that the CFTC “shall have exclusive

jurisdiction” over commodity futures and swaps trading on CFTC-designated exchanges. 7

U.S.C. § 2(a)(1)(A). Express provisions of this type are regularly held to preempt state law. See,

e.g. , BNSF Ry. Co. v. Cal. Dep’t of Tax & Fee Admin. , 904 F.3d 755, 765-66 (9th Cir. 2018)

(describing statute’s grant of “exclusive” jurisdiction as a “broad and general” preemption

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