And now, to a new moment of truth for obamacare. The law takes full effect at midnight. That means more than 1 million people who have enrolled for health insurance can start using it for the first... See More
And now, to a new moment of truth for obamacare. The law takes full effect at midnight. That means more than 1 million people who have enrolled for health insurance can start using it for the first time. And abc's jon karl is with the president, who is vacationing in hawaii. Jon, the stakes here, extremely high. Reporter: That's for sure, amy. All told, about 2 million people have signed up for private insurance through those obamacare marketplaces, including nearly 1 million in december alone. That's not quite what the administration had projected for this time. But it's a huge improvement over the troubled early days of the health care rollout. Now, the big test is whether or not all those enrollments have processed accurately. And whether people actually have the coverage that they believe they have enrolled in. And also, whether or not those new plans keep a promise that we heard the president make a lot, which is that if you like your doctor, you'll be able to keep your doctor. And, jon, of course, another pressing question on this new year's eve. And I see you are in the hawaiian party spirit there. How are the obamas celebrating tonight? Reporter: Well, we expect a low-key celebration with family. They're not going to be going out. But I can tell you one thing. We have no official word on that. But pretty safe bet the president will probably play another round of golf. He has managed to play golf almost every day he's been here in hawaii. Probably one more round of golf for 2013. All right. Jon karl, thanks so much. We appreciate it.
This transcript has been automatically generated and may not be 100% accurate.