House Judiciary Committee Chair Jim Jordan sent a subpoena to OpenAI Chief Executive Officer Sam Altman demanding information on the artificial intelligence startup’s engagement with foreign governments about complying with rules that Jordan said could impact Americans’ free speech rights.

In a letter to Altman dated Wednesday, Jordan expressed concern that regulators in places like the European Union, the UK and Brazil have enacted measures to curb disinformation and harmful content that risk hurting US users’ ability to freely express themselves on AI and other online platforms.