Protesters in favor of health care reform demonstrate outside of the Supreme Court in Washington, Monday, March 26, 2012, as a hearing on President Obama's health care legislation began. (AP Photo/Jacquelyn Martin)
March 27, 2012 12:32:37 AM PDT
By MARK SHERMAN and JESSE J. HOLLAND
Sharp questioning by the Supreme Court's conservative justices cast serious doubt Tuesday on the survival of the individual insurance requirement at the heart of President Barack Obama's historic health care overhaul.