Senator Cynthia Lummis said the latest U.S. crypto market-structure push has required one of the most difficult legislative efforts of her career, underscoring how hard it has been for lawmakers to turn digital assets into a workable federal rulebook.
Speaking during the Senate Banking Committee’s May 14 executive session on H.R. 3633, the Digital Asset Market Clarity Act of 2025, Lummis defended the bill as a product of years of negotiation across party lines, regulators, and industry groups. The committee session is focused on whether the bill should advance out of Banking after months of debate over SEC authority, CFTC oversight, stablecoin incentives, DeFi treatment, anti-money-laundering duties, and investor protections.
“This is the hardest piece of legislation I’ve ever worked on,” Lummis said, according to remarks carried during the markup coverage. She added that digital assets remain a new category that touches both commodities and securities law, requiring “a bipartisan effort, heavy lift, lots of negotiations” and input from people working in the industry.
The Senate Banking Committee’s schedule identifies the meeting as an executive session to consider the CLARITY Act. A markup does not equal final Senate passage. It gives committee members the chance to debate, amend, and vote on whether to send the measure toward the full Senate.
Crypto Bill Still Faces Democratic Resistance
The markup has also exposed the bill’s remaining political risk. Senate Banking Democrats released a national security advisory arguing that the CLARITY Act fails to close key illicit-finance gaps tied to DeFi services, mixers, sanctions evasion, foreign adversaries, ransomware, and other criminal activity.
Ranking Member Elizabeth Warren also criticized the bill during the session, saying it is “just not ready” and warning that the draft could leave major vulnerabilities inside the crypto market. Those objections show why Lummis framed the legislation as unusually difficult: the bill is trying to split oversight between financial regulators while also answering national security, banking, consumer-protection, stablecoin, and innovation concerns.
Recent CLARITY Act coverage has tracked how the bill moved toward committee majority support after a stablecoin-yield compromise gave lawmakers a path through one of the most contested issues. Coinbase CEO Brian Armstrong also backed the latest compromise, saying the bill was in the best position seen so far before the markup.
Market Structure Fight Moves To Committee Test
The CLARITY Act would create clearer federal lines for digital assets by defining when tokens and platforms fall under SEC or CFTC jurisdiction. It also addresses digital commodity exchanges, broker and dealer requirements, disclosures, custody rules, stablecoin rewards, and conditions under which certain network assets may trade outside traditional securities treatment.
That makes the bill more than a narrow crypto industry measure. Its outcome could shape exchange listings, market-maker activity, token issuance, DeFi access, custody operations, stablecoin payment models, and enforcement boundaries for years. Supporters see the bill as a way to bring crypto activity onshore under clearer rules, while critics argue that weak language could create loopholes for illicit finance and underregulated trading.
The next concrete marker is the committee vote and any adopted amendments. If the bill advances, lawmakers still need to build a broader Senate coalition capable of surviving floor debate. Lummis’ comments place the difficulty of that effort directly in the public record, with the markup now testing whether years of negotiation can produce a crypto framework strong enough to move beyond committee.
