According to a recent survey,

opinion remains divided on the Affordable Care Act: 31% of Americans say the law should be repealed entirely, 12% say they would like Congress to scale back what the law does, 21% say the law should be implemented as is, and 24% say the law should be expanded.

Source: "Kaiser Health Policy Tracking Poll: December 2014, Dec 18, 2014," Kaiser Family Foundation, December 18, 2014, http://kff.org/health-reform/poll-finding/kaiser-health-policy-tracking-poll-december-2014/