Ohio, Pennsylvania, etc. are traditionally Democratic states, but it's a region Trump spent a lot of time targeting with anti-globalist messages around the decline of domestic industry.
The predicted safe margin in the other direction, the narrow win, the demographic stats, the issues on the table ... it's all highly reminiscent of how I experienced Brexit.
Florida and North Carolina were considered competitive or "tossup" states, while several of the upper Midwestern states were considered fairly safe Democrat territories, probably because they were historically dominated by unionized manufacturing workers. That latter assumption has proved to be very unsafe, and it's become apparent that many of those formerly-reliable Democrat voters have switched sides, at least for this election.
