Because of this, Obamacare is not sustainable when it hurts insurers who must provide for millions of enrollees. In fact, many insurers are essentially forced to drop out of state health care exchanges where many insurers compete to keep health care prices low and affordable for the insured. CEO of insurer, Aetna, whose company stopped selling Obamacare plans in eleven out of fifteen state exchanges in August of 2016 stated, “The exchanges are a mess as they exist today” and that the exchanges are “losing a lot of money for a lot of people.” (Tracer) This means that Obamacare is costing insurers a large sum of money and this puts the insured at risk to suffer with them, for there will be less competition in the exchanges. Once again, Aetna CEO Mark Bertolini reported that Aetna would possibly consider a return to some state exchanges in 2020 and also credited the fall of Aetna to the lack of balance in the number of sick and healthy patients to balance costs for insurers. This shows that the impact of Obamacare on Aetna had severity that prevents them from returning for years to come which is not a healthy attribute for a sustainable entitlement system because if insurers cannot provide, there is no Obamacare. According to the Kaiser Family Foundation, because of insurer dropouts like the situation with Aetna, fifty-seven percent of exchange enrollees will have a choice of only at least insurers in 2017 which is down from eighty-five percent in 2016. (Cox) This shows that an insurer pulling out of exchanges has a negative impact on enrollees because they do not have as varied of a range of options and therefore this problem affects insurers and enrollees