Blue-collar workers have played a large role in electoral politics. In the 2016 United States Presidential election, many attributed Donald Trump's victories in the states of Iowa, Wisconsin, Ohio, Pennsylvania, and Michigan to white blue-collar workers. Since exit polls rarely classify respondents in occupational terms, the label "working class" is commonly applied to those without a four-year college degree. Although estimates vary, it is widely agreed that Trump won a substantial majority of white voters without college degrees. The majority was even larger among white male voters without college degrees who are most likely to hold stereotypical blue-collar jobs.