Health and Human Services Secretary Kathleen Sebelius testifies before the House Energy and Commerce Committee about problems with HealthCare.gov leading up to the Oct. 1 rollout.

The Patient Protection and Affordable Health Care Act, passed in March 2010, has been a controversial issue at the center of US President Obama’s term in office. It mandates that individuals who are not covered by employer or government-sponsored insurance must maintain minimal insurance coverage. On March 26, 2012, the US Supreme Court began 3 days of oral arguments to determine the constitutionality of Obama’s health care reform. On June 28, the Supreme Court upheld the law.

President Barack Obama’s top health care official told Congress on Wednesday that she’s responsible for the “debacle” of cascading technical problems that overwhelmed a government website intended to make shopping for health insurance clear and simple.