Close, But Not That Close
Votes are still being counted. But let's note that the early reports of a razor thin lead in the popular vote are now outdated. The current margin is Obama 51%, Romney 48%. Obama's gross margin is now well over 3 million votes and larger than George Bush's margin of just over 3 million votes. And that margin is almost certain to increase.
In 2008, it was Obama 52.9%, McCain 45.7%, with almost a 10 million vote margin.