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The Affordable Care Act (ACA), also known as Obamacare, was a sweeping healthcare reform law signed into law by President Barack Obama in 2010. The law was designed to expand health insurance coverage, reduce the cost of health insurance, and improve the quality of health care. Kathleen Sebelius was the Secretary of Health and Human Services from 2009 to 2014, and she oversaw the implementation of the ACA.