Has the fumbled rollout of the federal Obamacare site finally claimed its first head? The IT chief for the agency responsible for Obamacare is leaving to take a job in the private sector, five weeks after the much-criticized launch of HealthCare.gov. Officials repeatedly refused Wednesday to answer whether Tony Trenkle, the chief information officer of the Centers for Medicare and Medicare Services, was forced out of the job that he has held for three years because of the tech issues with the Obamacare marketplace. "Tony made a decision to move to the private sector," CMS spokeswoman Julie Bataille said during...