HCR Update from Mark Sanna: After an unprecedented, last-minute surge, the Affordable Care Act open-enrollment period closed last week, topping out at more than 7 million enrollees. But even as a triumphant White House celebrated surpassing its enrollment goal, Republican strategists were downplaying its significance. Though Obamacare undoubtedly hit a major milestone March 31, the path ahead could still be a rocky one.