Does anyone think U.S. Intelligence services already know what Trump and Putin discussed in that 2 hour meeting?

I do. And I have a suspicion we know it through the Russia side of things.

It can’t be let out right away for obvious reasons, but it will trickle out over time.

The Mueller investigation will get the details before anyone.

There is no way that Trump could let it be known he was going to be in a private meeting with Putin and our intel would allow that to happen.