Sen. Richard Blumenthal's letters say the money flowed while Hines led the White House crypto council. Hines now runs Tether's U.S. business, which is building a regulated stablecoin. The request comes from the minority and carries no subpoena power.
Sen. Richard Blumenthal, the top Democrat on the Senate Permanent Subcommittee on Investigations, has asked Tether and a consulting firm co-founded by Bo Hines for records on payments between them.
In letters sent on Thursday to Tether Chief Executive Paolo Ardoino and to Nxum Group, Blumenthal said "over $6 million flowed into Nxum from Tether" while Hines sought special exemptions and dispensation on behalf of the firm. The letters say the payments came while Hines was executive director of the White House crypto council and while the industry lobbied for favorable legislation.
Hines is now chief executive of Tether's U.S. business.
Blumenthal asked Tether for "all records and information related to contracts, payments, communications, and lobbying with the firm, Nxum, its cofounder Bo Hines, and all associated parties." The request follows a Wall Street Journal report on the payments. Responses from Tether and Hines were not immediately available.
What the letters can and cannot do
The inquiry is led by the subcommittee's minority, not the committee as a whole. It is a voluntary request for documents, not a subpoena, and there is no obligation to comply. The letters make allegations; they do not establish that anyone broke a law.
That limits the immediate practical effect. The political effect is another matter. The letters put the relationship between a former White House crypto official and Tether on the record, and they could become the basis for further action if control of the Senate changes after the Nov. 3 midterm elections.
Why it matters for Tether's U.S. plans
Tether is building USAT, a U.S.-regulated stablecoin, under Hines. Federal rules implementing the GENIUS Act take effect on Jan. 18, 2027, and issuers will need regulatory approval to operate. A conflict-of-interest inquiry aimed at the person steering that effort is a reputational overhang, even if it never produces formal findings.
The inquiry also lands in a week of scrutiny for politically connected stablecoins. On the same day, a Circle shareholder sued President Trump and World Liberty Financial over its USD1 stablecoin.
What to watch
Responses from Tether and Nxum, any further action by the subcommittee, and Tether's application timeline for USAT.