The usual questions in a scandal like this is “What did he know?” and “When did he know it?” While the former is still pretty up in the air, the growing evidence is that Trump either knew about Flynn’s phone conversations shortly after they happened or (more likely) knew about them as they went on and has been lying about it for weeks.

Now prosecuting Flynn for violating the Logan Act is a long shot, especially now that he’s “resigned” (I personally think he was pushed rather than jumped), but conspiracy generally is prosecuted and it was a big part of the list of charges against Nixon.