They are starting to declassify stuff from the past few years. The first gem shows that the Trump Campaign's Director, Paul Manafort, gave scores of official campaign materials to his KGB buddy Constantin Kilimnik, who passed them on to Russia. Russia produced disinformation materials that looked like they came from the Manafort documents. The chief prosecutor for the Mueller Investigation said they asked for all such information like this from the Trump Administration, yet never saw this intelligence. Look up the definition of collusion.