According to PANews, U.S. Senator Elizabeth Warren and several other lawmakers have sent a letter to David Sacks, the Trump administration's AI and cryptocurrency official, requesting clarification on his work days and location since his appointment in January. The senators are questioning whether Sacks has exceeded the annual 130-day limit for temporary employees. The letter highlights concerns that Sacks continues to manage his Silicon Valley venture capital firm, which invests in AI and cryptocurrency, while serving in the White House. This inquiry follows a New York Times investigation into the Trump family's cryptocurrency platform and a UAE AI chip transaction, in which Sacks is alleged to have played a pivotal role.