Federal cybersecurity officials give a sobering warning about the vulnerabilities of critical information technology systems. They appeal for expanded government authority to shore up the nation’s digital defenses. But deep divisions arise in the policy debate over what role the federal government should play in developing and overseeing cybersecurity. In the Senate, competing bills have emerged to address the cybersecurity challenge. Any legislation that includes the DHS provisions would face vehement opposition in the Republican-controlled House, which is sharply critical of DHS’ performance on many security fronts.”]