Point three in his three-point takeaway:

The presumption among delighted people on the left-liberal side is that all this roiling on the right suggests a party in disarray and a movement intent on cannibalizing itself. That’s one way to look at it. The other is that the GOP is actually expanding and seizing the populist mood that seems to be the national direction — even though the GOP leadership, especially in the Senate, is finding the whole business unnerving and destructive.