What Happened? An Examination of Critical Change in the 2016 Election

The 2016 U.S. presidential election results surprised many, after several groups many believed to be surefire voters for Democrats based on previous elections voted for Republican Donald Trump (Bump, 2016). Whenever a change takes place in voter patterns, one begins to hear phrases like “critical election” and “political realignment.” A critical election is an election where there is a change of at least 10 percent in partisan alignment, but it does not persist in the next election. A partisan realignment is similar to a critical election, but the change is more durable. This research explores whether the 2016 election can be classified as a critical election and whether and how key groupings of Democratic voters voted in the election compared to their votes in the 2012 election. Using data aggregated at the county level, regression analyses suggest that voters’ education, access to health care, union membership, racial/ethnic diversity, and income level all had statistically significant relationships with votes in both elections and with the change in vote between 2016 and 2012, all were substantively significant or in directions consistent with the presence of a critical election when viewed either from the national or even regional viewpoint. Evidence suggests that 2016 was a critical election.