Four major U.S. law enforcement organizations sent a joint letter on June 23, 2026, to Acting Attorney General Todd Blanche and Patrick Witt, Executive Director of the President's Council of Advisors for Digital Assets, warning that a provision in the Digital Asset Market Clarity Act would weaken their ability to prosecute cryptocurrency-related financial crimes. The groups said their concern over Section 604 of the bill "remains unresolved."

The signatories, the National District Attorneys Association, the National Association of Assistant U.S. Attorneys, the International Association of Chiefs of Police, and the National Sheriffs' Association, collectively represent more than 70,000 law enforcement professionals. Their objection centers on Section 604, which incorporates the Blockchain Regulatory Certainty Act and would exempt so-called "non-controlling developers or providers" from classification as money transmitters under federal law. In plain terms: if a developer cannot unilaterally move user funds or initiate transactions, the bill says they are not running a money transmission business and do not need to register or collect customer identity information.

Law enforcement groups argue that definition is broad enough to protect the developers and operators of cryptocurrency mixers and tumblers, tools that blend transaction histories across many users to obscure the source of funds. These services have been widely used to launder proceeds from sanctions evasion and human trafficking.

Chainalysis data shows illicit crypto addresses received at least $154 billion in 2025, a record high, with value flowing to sanctioned entities rising 694 percent year over year. The same report found crypto scam losses totaling $17 billion globally and an 85 percent increase in human trafficking-related crypto volume. In just the first two months of 2026, law enforcement seized more than $22 billion in illicit cryptocurrency, a figure that underscores why investigators consider their current tracing tools worth protecting.

The stakes of the law enforcement objection are concrete and legislative. Senators Mark Warner and Catherine Cortez Masto, both Democrats, have tied their floor votes to a resolution of the Section 604 dispute. Their support is needed to reach the 60-vote threshold required to advance the bill in the Senate. Sen. Cortez Masto has stated the bill "undermines law enforcement's ability to trace illicit finance and recover victims' money, while at the same time creating a more challenging environment to prosecute criminals for knowingly transmitting illicit funds." The bill passed the House 294 to 134 in July 2025 and cleared the Senate Banking Committee 15 to 9 in May 2026, but it has yet to receive a Senate floor vote.

Not all stakeholders share law enforcement's concerns. More than 60 founders and investors, including representatives from Coinbase, a16z, Uniswap, and Kraken, signed a statement opposing the coalition's position on Section 604, signaling that the debate over the exemption extends well beyond Capitol Hill.

The Tornado Cash case anchors the legal debate. In August 2025, Roman Storm, a co-founder of the Ethereum-based privacy protocol, was convicted of conspiracy to operate an unlicensed money transmitting business, a count carrying a confirmed five-year sentence. A jury deadlocked on more serious money laundering and sanctions charges, which carry up to 40 additional years of potential imprisonment; the Justice Department is pursuing a retrial on those counts with a proposed start date of October 2026, leaving Storm facing a total potential exposure of 45 years. Supporters of Section 604 argue it would have likely shielded a developer in Storm's position from the unlicensed transmission conviction. That is precisely the outcome prosecutors fear. Sen. Cynthia Lummis (R-WY), a lead author of the bill, countered that the provision still "allows law enforcement to prosecute bad actors who publish code with the specific intent that their code be used to facilitate money laundering."

White House adviser Patrick Witt called the CLARITY Act "the most pro-law enforcement crypto bill ever considered by Congress." Sen. Lummis has separately argued that the current status quo already places digital asset exchanges under lower Bank Secrecy Act and anti-money-laundering requirements than the bill would impose. Witt reinforced the case in pointed terms: "Law enforcement should be the biggest cheerleaders for this bill, because this is really what is missing."

Notably absent from the letter were the Fraternal Order of Police and the National Association of Police Organizations. Both groups attended earlier White House negotiating sessions but did not sign on to the June 23 letter.

The division within the U.S. law enforcement community carries weight for jurisdictions around the world that have spent recent years aligning their own frameworks with international standards and that look to Washington for compliance signals.

Nigeria was removed from the FATF grey list in October 2025 after sustained AML reforms, and its Central Bank has since eased restrictions on banks serving licensed crypto platforms. Any loosening of U.S. enforcement pathways over DeFi and mixing services could create global channels that undermine that progress. Kenya's October 2025 crypto legislation aligned closely with FATF travel rule and KYC standards, but enforcement capacity there is still developing. An INTERPOL and AFRIPOL operation named Operation Catalyst, spanning six African countries (Angola, Cameroon, Kenya, Namibia, Nigeria, and South Sudan), resulted in 83 arrests and the identification of more than 160 persons of interest using blockchain forensics. The operation was supported by Binance's threat intelligence unit, illustrating that private crypto industry actors are already cooperating with investigators in ways that could be complicated by weakened U.S. investigative frameworks. Those investigations depend on the ability to trace funds through mixing services, and a shift in U.S. policy could directly affect cross-border coordination.

In South Asia, India's Financial Intelligence Unit had registered 49 exchanges under its anti-money-laundering framework as of January 2026, and Pakistan passed a new Virtual Assets Act in March 2026 with FATF-aligned obligations for infrastructure providers. Pakistan's framework is administered through the newly established Pakistan Virtual Assets Regulatory Authority and includes a Shariah-compliant licensing regime, a distinction relevant to its domestic financial system and to South Asian markets more broadly.

A broad U.S. developer exemption would, by most assessments, sit poorly with both frameworks and could fragment compliance obligations for globally distributed development teams.

Compounding those concerns, the Bank Policy Institute has found that the CLARITY Act only requires the Treasury to study mixers and tumblers rather than granting direct regulatory authority over them. Separately, a 2024 Fifth Circuit ruling has already limited the Office of Foreign Assets Control's ability to sanction immutable smart contract code. Taken together, these developments suggest that law enforcement's toolkit is being eroded from multiple directions at once, a backdrop that gives the coalition's June 23 letter an urgency extending well beyond any single bill.

The Senate has fewer than eight weeks of floor time remaining before summer recess. Sen. Lummis has been direct about the cost of delay: "If we don't get it done this year, we're probably looking at about 2030 before this bill could ever have a shot again." The outcome now rests on a binary: resolve Section 604 in a way that satisfies Warner, Cortez Masto, and the broader 60-vote threshold, or watch the legislation stall for the better part of a decade.