US Senator Elizabeth Warren has called on regulators to impose growth restrictions on Citigroup due to the bank's prolonged struggle with data, controls, and other management issues. On October 3, Warren, a prominent Democratic senator, expressed concerns that Citigroup has become 'too big to manage' and highlighted ongoing regulatory problems as the basis for her request. This call for action comes as Citigroup faces scrutiny over its ability to address these persistent issues. Citigroup's stock was down -0.4% pre-market following the news.