Who's to blame for the Clinton campaign's blunders?

I‘ve long said that the hardest thing about running a political campaign comes, when you’re besieged (as you inevitably are) by calls urging you to change your strategy, and you must distinguish the nine instances out of ten when you shouldn’t do so from the one in ten time when you should.

If there’s one thing that’s plain about the strategists at Hillary Clinton’s Brooklyn headquarters, led by the millennial wunderkind Robby Mook, is that they failed this test. And there’s no better example than their dogged refusal, despite multiple pleas from knowledgeable and concerned Clinton backers, to change their strategy in my home state of Michigan. Edward-Isaac Dovere has some good reporting on this in Politico.