In 2015, Anthem Blue Cross bid to acquire CIGNA in a $54 billion deal. If approved, this would have created the largest health insurer in the nation. What happened to this merger, and which government agencies got involved to oppose this merger? Also in 2015, a second merger was proposed between Aetna and Humana for $37 billion. What happened to this merger, and which government agencies got involved to oppose this merger?