<Li> Obama administration proposals </Li> <Li> Reform advocacy groups </Li> <Tr> <Td> Systems (show) <Ul> <Li> Free market </Li> <Li> Health insurance exchange </Li> <Li> Nationalized insurance </Li> <Li> Publicly - funded </Li> <Li> Single - payer <Ul> <Li> Canadian vs. American </Li> </Ul> </Li> <Li> Two - tier </Li> <Li> Universal </Li> </Ul> </Td> </Tr> <Ul> <Li> Free market </Li> <Li> Health insurance exchange </Li> <Li> Nationalized insurance </Li> <Li> Publicly - funded </Li> <Li> Single - payer <Ul> <Li> Canadian vs. American </Li> </Ul> </Li> <Li> Two - tier </Li> <Li> Universal </Li> </Ul>

Who administers the affordable care act's health insurance exchanges