Attorneys general in 16 states weighed in Thursday on a federal lawsuit filed by the National Labor Relations Board, alleging that its complaint against Boeing Co. for building a South Carolina assembly plant hurts states’ abilities to keep manufacturing jobs.

The 16 attorneys general – all but one of whom are Republicans – oppose the lawsuit filed in April by the NLRB claiming that Boeing located a new 787 passenger aircraft assembly line in South Carolina to retaliate against Washington state union workers who went on strike in 2008.