Here comes the surge. More than 10 million people have selected Obamacare insurance plans or been automatically re-enrolled in existing plans, with just 11 days of open enrollment in health coverage remaining this season, according to official data released Wednesday. And after another relatively low number of sign-ups for the week ending last Saturday on HealthCare.gov, there has been a marked uptick in the number of plan selections in recent days on that federally run exchange, which sells insurance in 37 states, a top health official said.