Senate's top Democratic investigator looking into Tether payments to Bo Hines' firm

“Tether is aware of the allegations reported in The Wall Street Journal that form the basis of Senator Blumenthal’s letter,” the company said in a statement. “External counsel previously conducted an in-depth internal investigation into the matter, which found no evidence of wrongdoing.”

CoinDesk had been first to report earlier that Hines' company — which had little track record or experience in politics — was making millions of dollars as the main campaign-advertising provider for a political action committee associated with Tether.

Hines' family firm, Nxum, has recently hired another official that worked as a White House crypto adviser, Harry Jung. The office that advised Trump on crypto issues has since gone vacant, with the departure of Patrick Witt, who had replaced Hines as its executive director.

Blumenthal has been focusing significant attention on crypto, including on Trump's memecoin, crypto backers of the president's projects, Trump family crypto firm World Liberty Financial, activities at Binance and especially on Tether. He issued a report on its financial connections to Iran, and he more recently demanded answers about Tether's connection to its U.S. financial partner, Cantor Fitzgerald.

Tether's Ardoino criticized the senator's work this week, saying Blumenthal ignored important information and shared his report with the press before giving the company a look or a chance to respond.