From Josh Marshall at TPM:
There is only one reasonable conclusion that can be drawn from the decision to fire Comey: that there is grave wrongdoing at the center of the Russia scandal and that it implicates the President. As I write this, I have a difficult time believing that last sentence myself. But sometimes you have to step back from your assumptions and simply look at what the available evidence is telling you. It’s speaking clearly: the only reasonable explanation is that the President has something immense to hide and needs someone in charge of the FBI who he believes is loyal. Like Jeff Sessions. Like Rod Rosenstein.
This is a very dark and perilous moment.
Read the whole piece for clarity