Today Obama cautioned conservatives against getting too excited over Obamacare's overturn:
"I'd just remind conservative commentators that for years what we've heard is the biggest problem on the bench was judicial activism, or a lack of judicial restraint,"
Obama seems to be a little confused about the term "judicial activism". Judicial activism is when judges base decisions on their own biases or views. Making a decision based on the Constitution or stare decisis wouldn't be activism. You can think a judge made the wrong decision- but just because you don't agree with it doesn't mean it's activism.

Further, it's very unbecoming of the office to the president to try to call out the SCOTUS on the eve of a decision because he's worried it might not go his way. It almost smacks of intimidation. I guess at least he's not threatening to pack the court.....