Blumenthal Turns Up Heat on Tether and Cantor Fitzgerald Over Iran Sanctions

Senator Richard Blumenthal isn't done asking uncomfortable questions about Tether. The ranking Democrat on the Senate Permanent Subcommittee on Investigations has escalated his long-running probe by directly confronting Cantor Fitzgerald—the financial institution custodying the stablecoin's U.S. reserves. In a letter sent October 8, he demanded Brandon Lutnick, Cantor's CEO, spell out exactly how the firm oversees Tether's holdings and what safeguards exist to prevent the stablecoin from being weaponised by sanctioned entities.

The move is strategic. Blumenthal is zeroing in on what might be crypto's most critical vulnerability: a single U.S. financial firm sitting on top of over $100 billion in Tether assets. That concentration gives Cantor Fitzgerald enormous control. And given that 84% of wallets flagged for seizure by U.S. Treasury and Israeli authorities used USDT almost exclusively—according to a September 28 Senate report—that control matters.

Then there's the awkwardness. Brandon Lutnick took over Cantor Fitzgerald in February, right after his father Howard Lutnick became U.S. Secretary of Commerce. Blumenthal pointedly raised this in his letter, asking for details on "any Tether loan or other arrangement connected to Howard Lutnick's transfer of his Cantor ownership to his children." Reports suggest Cantor holds roughly 5% of Tether, a stake that's grown substantially in value since Trump's return to office. The optics aren't great.

What triggered this escalation? A damning September report linking Tether to Iran's shadow banking network and terrorist-linked organisations. Treasury and Justice departments now have referrals asking whether Tether broke sanctions and anti-money-laundering law.

Blumenthal's October letter to Lutnick is methodical. He wants to know what steps Cantor has taken to investigate allegations of illicit finance and money laundering through Tether. He wants banking operations details, sanctions compliance procedures, and a full breakdown of revenue streams from the Tether relationship. He's also making a point: "While Tether claims to operate out of El Salvador, the vast majority of its assets reside in the United States under your custodianship." Translation: you can't hide behind offshore rhetoric when the money lives in America.

Tether's response has been defensive. But the historical record shows delays. Millions moved through flagged wallets before Tether acted, sometimes only after formal seizure orders.

Here's where it gets interesting politically. If they do, Blumenthal gains subpoena power and chairmanship of the Investigations Subcommittee. Right now he's a minority-party fact-finder. With majority control, he becomes dangerous. His inquiries become legally enforceable. Witnesses can be compelled. Documents can be demanded.

That's probably why the pressure is intensifying now. Blumenthal knows what's possible if Democrats win. And Tether knows it too.

Source & further reading:

• Top Democrat among Senate investigators probes ties between Cantor Fitzgerald, Tether — CoinDesk
• Wall Street's tokenization boom could have bigger winners than bitcoin and ether, Citrini says — CoinDesk
• Crypto crumbles as anniversary of flash crash nears — CoinDesk
• NFL joins pushback against prediction markets as U.S. Supreme Court asked to act — CoinDesk
• U.S. government moves $1 billion in bitcoin tied to Bitfinex hack, with no sign of sale — CoinDesk
• Senate Democrat Seeks Records on Cantor Fitzgerald, Tether Ties — TokenPost
• US Senator Blumenthal Calls Tether's USDT a 'Superhighway' for Iranian Sanctions Evasion — Decrypt
• Blumenthal Releases PSI Report Detailing how Lutnick-Linked Crypto Firm Tether Props Up Iran's Shadow Banking System — Blumenthal Senate Official Site
• Tether's USDT at center of Iran's shadow banking network, new Senate Report says — The Block