When Health Republic Insurance of New Jersey announced recently that it’s $46 million in debt and shutting down, it became the 17th failed ObamaCare co-op since the Affordable Care Act launched three years ago.Those failures – just six of the original 23 co-ops remain – have left hundreds of thousands of people scrambling for coverage. Meanwhile, insurers claiming big losses are leaving some state exchanges — including Indiana University Health Plans, whose exit is expected to result in 27,000 Indiana residents losing ObamaCare plans in 2017. And companies still operating in the federal and state exchanges are raising premiums for next year. Together, the developments are posing new challenges for Americans seeking affordable coverage, and show the highly touted overhaul of the country’s health care system is in some cases not yielding the savings President Obama once promised.As a candidate on the campaign trail in 2008, Obama once said: “If you’ve got health insurance, we’re going to help that employer save $2,500 per family per year. … Those savings are going to be passed along to the workers.”Nationally, though, premium hikes are expected to average 8 percent next year. Many insurance companies are seeking much more than that, for the exchange plans and those offered to employers. Premera in Washington state is approved to charge 19 percent more next year. Rates across California will go up an average of 13 percent. Blue Cross and Blue Shield of Texas is asking to raise premiums a stunning 60 percent.Long-time critics of ObamaCare say they saw it coming.