The battle over union representation at Volkswagen of America will shift this month from plant workers in Chattanooga to a hearing officer for the National Labor Relations Board.

Supporters and opponents of the United Auto Workers union will soon be allowed to argue before the NLRB whether another election should be conducted for workers to decide on representation by the UAW. Despite objections from both VW and the UAW, the labor board agreed this week to allow opponents to the union to argue against UAW's petition for the new election.

By a narrow 712-626 margin last month, VW workers voted against joining the UAW at VW's only U.S. assembly plant. The UAW mounted a two-year campaign to organize the Volkswagen facility, where more than 2,000 employees make more than 100,000 Passat cars every year.

The UAW claims a new vote is needed because Tennessee state legislators and U.S. Sen. Bob Corker, R-Tenn., interfered in Feb. 12 to Feb. 14 balloting by threatening to withhold state incentives if the plant was unionized and by suggesting that a plant expansion was more likely if workers rejected the union. UAW President Bob King called the politicians' comments "outrageous" and said they interfered with the otherwise neutral playing field for the workers to decide on the union.

Read more from our news partners at the Chattanooga Times Free Press.