“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…