According to CoinMeta, Richard Blumenthal, the chief Democratic member of the Senate Select Committee on Intelligence, wrote to Tether and Nxum Group, requesting an explanation for the arrangements regarding payments made by Tether to Nxum Group. Nxum Group was founded with the participation of White House crypto advisor Bob Haines. During Bob Haines' tenure as a White House crypto advisor, Nxum Group received large payments from Tether. Richard Blumenthal stated that there are ethical and legal concerns regarding the business relationships between Tether, Nxum Group, and Bob Haines.