Polls have closed at South Carolina's Boeing facility. Workers cast ballots Wednesday considering if they want to be unionized. Workers voted at several locations on the aviation giant's manufacturing facilities in North Charleston. Nearly 3,000 production workers were eligible to participate in the vote determining if they'll be represented by the International Association of Machinists and Aerospace Workers. The union petitioned for a vote in 2015 but withdrew it because of what the Machinists called a toxic atmosphere and political interference. President Donald Trump is expected to visit Boeing on Friday for the rollout of the first 787-10 Dreamliner from the South Carolina campus. A year ago, then-candidate Trump warned during a campaign appearance that, unless he won, Boeing would soon ship all its jobs from South Carolina to China, where Boeing had agreed to open a facility. To get breaking news alerts sent to your phone download the WYFF 4 app here.