Throughout the 2016 election, Hillary Clinton made it clear that she had no interest in courting white voters. Instead of embracing everyone, Hillary embarked on a plan of "maximum identity politics." She decided to divide the electorate, pit one group against another, and relegate whites (men in particular) to her infamous "basket of deplorables."
It was a deeply flawed strategy which grossly overestimate her ability to appeal to minority voters. In short, she thought she'd enjoy the same demographic turnout achieved by Barack Obama. For a whole host of reasons - chief among them her lack of charisma and her disastrous trust numbers - that support failed to materialize.