Medicare chief Marilyn Tavenner testifies Tuesday before the Senate Health, Education, Labor, and Pensions Committee about problems with the rollout of Obamacare. Committee Republicans have emphasized coverage cancellations and increased costs while raising questions about cybersecurity for HealthCare.gov. (Associated Press)

Photo by: J. Scott Applewhite

Medicare chief Marilyn Tavenner testifies Tuesday before the Senate Health, Education, Labor, and Pensions Committee about problems with the rollout of Obamacare. Committee Republicans have emphasized coverage cancellations and increased costs while raising questions about cybersecurity for HealthCare.gov. (Associated Press)