Arguably the most important power at stake in Tuesday’s election was Congressional oversight, and the most important change may be Adam Schiff at the House Intelligence Committee. The Democrat says his top priority is re-opening the Trump-Russia collusion probe, but more important may be his intention to stop investigating how the FBI and Justice Department abused their power in 2016. So let’s walk through what we’ve learned to date.

Credit for knowing anything at all goes to Intel Chairman Devin Nunes and more recently a...