In summary here is what we know about Obama’s actions:
He had a meeting with his intelligence team where he was briefed about Gen. Flynn’s back-channel conversations with a country that had committed an attack on our elections during his watch.
At the meeting he is told that some of Flynn’s conversations with Russia are unusual, but none of them include the sharing of any classified intelligence.
Obama says that the investigation should be done “by the book” unless new information comes to light at which point he should be briefed again.
President Obama privately warns President-elect Trump about Flynn in one of their only conversations.
What we have here my friends is By-The-Book-Gate!