Did Obama's National Security Adviser Unmask Trump's National Security Adviser?

Is this the biggest political scandal of our lifetime?

If so, what did Obama know and when did he know it?

"One U.S. official familiar with the reports said they contained valuable political information on the Trump transition such as whom the Trump team was meeting, the views of Trump associates on foreign policy matters and plans for the incoming administration,” Mr. Lake reported."

Eli Lake reports in Bloomberg