Senator John Curtis of Utah called for the Senate Judiciary Committee to probe Donald Trump Jr. following a ProPublica report that a Russian oligarch close to Vladimir Putin paid for a wedding after-party. The Republican senator's request includes a subpoena for Trump Jr. and an investigation into his advisory ties to prediction market platforms that rely on favorable regulatory decisions from the Commodity Futures Trading Commission.

Senator Dick Durbin, the top Democrat on the Judiciary Committee, supports the call for a subpoena. Curtis stated that congressional oversight should not begin and end when control of the White House changes hands, arguing that the country should not accept different standards for the families of Republican and Democratic presidents.