Senator Cynthia Lummis has sharply rebuked JPMorgan Chase CEO Jamie Dimon for his recent attack on the Clarity Act and Coinbase CEO Brian Armstrong. The Wyoming Republican claimed Dimon either failed to read the legislation or deliberately misrepresented its contents.
During a CNBC interview, Lummis, who chairs the Senate Banking Subcommittee on Digital Assets, responded after Dimon argued that the bill lacks robust protections for stablecoins and crypto deposits. She described his remarks about Armstrong as “really distasteful.”
Dimon had previously told CNBC that “no one is going to bow down to Armstrong or Coinbase” and labeled Armstrong as “full of sh–” while discussing the Clarity Act and banking industry opposition. He contended that the bill would allow crypto firms to offer interest-like rewards without the safeguards that banks must follow, and claimed it does not adequately address Anti-Money Laundering rules or the Bank Secrecy Act.
Lummis rejected that interpretation, asserting that AML and BSA requirements already apply to digital assets and are explicitly included in the bill. The dispute centers on whether crypto platforms should be permitted to reward users for holding stablecoins, a practice that banking groups warn could let crypto firms compete with banks while avoiding deposit insurance rules.
The American Bankers Association has urged lawmakers to close what it sees as a loophole that allows digital asset service providers to bypass restrictions on paying yield on payment stablecoins. These concerns were tied to the GENIUS Act, which established stablecoin rules prior to the current market-structure debate.
A legal analysis from Davis Wright Tremaine noted that the Digital Asset Market Clarity Act, advanced by the Senate Banking Committee on May 14, 2026, covers illicit finance, decentralized finance, stablecoin yield limits, tokenization standards, developer protections, customer property rules, and bankruptcy protections.
When asked about her financial and political ties to the crypto industry, Lummis told CNBC that lawmakers working on industry-specific legislation commonly receive contributions from those affected by the policies. She has been one of Congress’s most vocal crypto supporters and is building a pro-crypto coalition in Congress. Coinbase has emerged as one of the largest political donors in the crypto space, as debates intensify over whether digital asset rules should empower market regulators or banking regulators.