1. Disillusioned white working class democrat who likes Trump's focus on illegal immigration and lack of religious conservatism(compared to other GOP candidates). Not a big fan of Hillary or socialist bernie. Either willing to overlook trump's other positions OR never actually gave a damn about unions and obamacare.
Or it is possible they could be union supporters who believed Obamacare undermined the purpose of forming a union. Another possibility is a union supporter who believes illegal immigration is the most important issue for union workers.