Rep. Issa: Boeing 'guilty until proven innocent' in NLRB complaint

"When the government prosecutes you and spends its millions and you're guilty until proven innocent through constant appeals, that's probably overstepping," he said.

Boeing opened its new plant in Charleston, S.C., where it plans to build 787 airplanes, this month. However, if the NLRB complaint is ultimately successful, the company could be forced to build the planes it intends to build there in Seattle.

 A judge in Seattle heard the opening arguments in the case last week on a Boeing motion to dismiss. The case is expected to last several weeks.