A key thing scientists do (at least the good ones) is confirm their analyses using multiple kinds of data. Unfortunately, the Clinton campaign in the key state of Michigan didn’t do that (boldface mine):
Michigan operatives relay stories like one about an older woman in Flint who showed up at a Clinton campaign office, asking for a lawn sign and offering to canvass, being told these were not “scientifically” significant ways of increasing the vote, and leaving, never to return. A crew of building trade workers showed up at another office looking to canvass, but, confused after being told there was no literature to hand out like in most campaigns, also left and never looked back.
“There’s this illusion that the Clinton campaign had a ground game. The deal is that the Clinton campaign could have had a ground game,” said a former Obama operative in Michigan. “They had people in the states who were willing to do stuff. But they didn’t provide people anything to do until GOTV.”
The only metric that people involved in the operations say they ever heard headquarters interested in was how many volunteer shifts had been signed up — though the volunteers were never given the now-standard handheld devices to input the responses they got in the field, and Brooklyn mandated that they not worry about data entry. Operatives watched packets of real-time voter information piled up in bins at the coordinated campaign headquarters. The sheets were updated only when they got ripped, or soaked with coffee. Existing packets with notes from the volunteers, including highlighting how much Trump inclination there was among some of the white male union members the Clinton campaign was sure would be with her, were tossed in the garbage.
The Brooklyn command believed that television and limited direct mail and digital efforts were the only way to win over voters, people familiar with the thinking at headquarters said. Guided by polls that showed the Midwestern states safer, the campaign spent, according to one internal estimate, about 3 percent as much in Michigan and Wisconsin as it spent in Florida, Ohio and North Carolina. Most voters in Michigan didn’t see a television ad until the final week.
Most importantly, multiple operatives said, the Clinton campaign dismissed what’s known as in-person “persuasion” — no one was knocking on doors trying to drum up support for the Democratic nominee, which also meant no one was hearing directly from voters aside from voters they’d already assumed were likely Clinton voters, no one tracking how feelings about the race and the candidates were evolving. This left no information to check the polling models against — which might have, for example, showed the campaign that some of the white male union members they had expected to be likely Clinton voters actually veering toward Trump — and no early warning system that the race was turning against them in ways that their daily tracking polls weren’t picking up.
I realize things like the Comey letter are equally important–everything is important in a close loss. But you don’t have control over rogue FBI directors or assholes in the media. You do, however, have control over your message and your ability to assess the state of the race. So these are things that are relatively easy to fix, and, importantly, don’t rely on factors beyond your control.