NORTH CHARLESTON — Republican presidential candidate Mitt Romney is visiting the Boeing Co. plant in North Charleston before heading on to Florida for a GOP debate.

Romney visits the North Charleston plant on Monday and then gives a policy speech on labor relations.

The National Labor Relations Board has sued Boeing, alleging the $750 million plant was built in South Carolina to avoid unionized labor in Washington state. South Carolina, which has the South’s first GOP primary, is a strong right-to-work state.

Romney said at a forum in Columbia earlier this month powerful labor organizations need to be kept in check.

Gov. Nikki Haley has been strongly critical of the Obama administration because of the NLRB complaint against Boeing.