WASHINGTON (AP) — The principal contractors responsible for the federal government's troubled health insurance website say the Obama administration shares responsibility for snags that have crippled the system. Executives of CGI Federal, which built the federal HealthCare.gov website serving 36 states, and QSSI, which designed the part that verifies applicants' income and other personal details, were testifying Thursday before the House Energy and Commerce Committee. As the hearing began, Republican committee members said the website problems are symptomatic of deeper flaws in the Affordable Care Act, and they accused administration officials of misleading Congress with repeated assurances that the rollout...