Senator John Curtis, a Republican from Utah, is calling for Senate investigations into Donald Trump Jr. over his foreign business dealings and gifts from Russian oligarchs, arguing that the same oversight standards should apply to both Republican and Democratic presidential families. Curtis contends that concerns about foreign access to sitting presidents' relatives and potential conflicts of interest merit scrutiny regardless of party, noting that scrutiny should not begin and end based on which party controls the White House.

The controversy centres on Trump Jr.'s May wedding after-party on a private island allegedly funded by a Russian oligarch with close ties to Vladimir Putin. Curtis also cited Trump Jr.'s involvement in family-backed cryptocurrency ventures, international real estate deals involving meetings with foreign heads of state, and ties to prediction market platforms dependent on regulatory decisions. Trump's reported wealth surged approximately 250 per cent between 2024 and 2025—from $620 million to $2.2 billion—largely through cryptocurrency holdings managed by his sons.