Like, the meeting with the Russians in Trump tower. Which, they hid. And then denied. Which is weird, because they are innocent.
Incidentally, one of the men in that meeting, Manafort, the presidents campaign chairman at the time, is currently under indictment of ~30 charges, one of a which is conspiracy against the United States. Turns out he was a foreign agent. For Russian interests. He’s looking at a couple hundred years.
Just to name one instance.