U.S. Republican Senator John Curtis called for an investigation into Donald Trump Jr. and Hunter Biden, involving cryptocurrency business

U.S. Senator John Curtis from Utah, a Republican, wrote to Chuck Grassley, the Chairman of the U.S. Senate Judiciary Committee, and Dick Durbin, the Chief Minority Whip, calling for an investigation into whether Donald Trump Jr. and Hunter Biden exploited their presidential family connections for personal financial gain, and requested subpoenas for both individuals. Curtis pointed out that Donald Trump Jr. had accepted wedding gifts from Russian oligarch Umar Kremlev, actively promoted family-backed cryptocurrency ventures, and served as an advisor for a prediction market platform; the related companies are regulated by the Commodity Futures Trading Commission. Donald Trump stated that his son has returned the relevant funds to Umar Kremlev.

Curtis also called for an investigation into Hunter Biden's substantial business dealings with foreign entities, as well as whether the two utilized their relationship with the president to create commercial value. He mentioned that Joe Biden pardoned Hunter Biden in December 2024, who had previously denied involving his father in business transactions. A week prior to this investigation call, Senate Republicans failed to garner enough Democratic support to advance the Digital Asset Market Clear Act. Some Democratic senators opposed the bill, citing reasons including Donald Trump's use of cryptocurrency ventures to gain benefits related to the presidency; Donald Trump disclosed that he earned $1.4 billion from digital asset-related businesses in 2025.