The Obama administration's effort to end one political crisis during the 2014 Obamacare rollout may have sown the seeds of another controversy: potential double-digit rate hikes in 2015. If insurers have their way, some residents in politically key states like Florida, North Carolina and Iowa would face hikes of 11 percent to nearly 18 percent — far beyond the average 7.5 percent increase in proposed rates for much of the country. Major carriers there in part blame such increases on the administration's response to the furor that erupted when millions of Americans received notice last fall that their health policies would be canceled because they fell short of Obamacare requirements.