Interesting observations by Stanley Greenberg who was consulted by Hillary Clinton's campaign director, John Podesta, during the 2016 election campaign. Longer article, but well worth reading including, but obviously not limited to, his observations about the role Michigan voters played in the election.
"Not surprisingly, Clinton took her biggest hit in Michigan, where she failed to campaign in Macomb County, the archetypal white working-class county. That was the opposite of her husband’s approach. Bill Clinton visibly campaigned in Macomb, the black community in Detroit, and elsewhere.
The fatal conclusion the Clinton team made after the Michigan primary debacle was that she could not win white working-class voters, and that the “rising electorate” would make up the difference. She finished her campaign with rallies in inner cities and university towns. Macomb got the message. “When you leave the two-thirds of Americans without college degrees out of your vision of the good life, they notice,” Joan Williams writes sharply in White Working Class: Overcoming Class Cluelessness in America.
Additionally, Sanders campaigned against bad trade deals like NAFTA and the TPP to show he’d battle for working people."