Here is what I gleaned from watching CNN in the last 20 minutes:
Apparently there were TWO parts to the briefings given last week.
The second known to only 10 people. Pres/Pres-elect: the 8 Congressional leaders.
This second was beyond the well known Russian Influence hacking of the Democatic party.
But has now breaking out into the open.
Apparently the Russians Claim:
1. The they have Compromising info on Trump personally and financially.
(I joked/intimated about 'Kremlin Hilton Trysts' and 'Russian Loans' a few days ago)
2. There were ongoing contacts between the Trump campaign/surrogates and the Russians.
These are said to be very reliable but Uncorroborated as of yet.
The FBI will neither confirm nor deny they are investigating. IOW, they are.
This could explain Trump's refusal to condemn the Russian Hacks, indeed he bizarrely asked for more out loud.
Intel chiefs presented Trump with claims of Russian efforts to compromise him
Intel chiefs presented Trump with claims of Russian efforts to compromise him - CNNPolitics.com
By Evan Perez, Jim Sciutto, Jake Tapper and Carl Bernstein, CNN
Updated 5:15 PM ET, Tue January 10, 2017