From an editorial in The Wall Street Journal, pointing out there would be nothing unprecedented in the Supreme Court overturning ObamaCare:
In Marbury in 1803, Chief Justice John Marshall laid down the doctrine of judicial review. In the 209 years since, the Supreme Court has invalidated part or all of countless laws on grounds that they violated the Constitution. All of those laws were passed by a "democratically elected" legislature of some kind, either Congress or in one of the states. And no doubt many of them were passed by "strong" majorities.
Read the full opinion rebuking Obama's complaint about judicial activism here.
I don't buy the argument that Obama is ignorant of these fundamentals of the history of American law. I think he's hostile towards them, and wants them all swept away, along with the Constitution.