North Carolina's Republican-controlled legislature passed a new congressional map on Wednesday aimed at securing the party another seat in the U.S. House of Representatives, expanding President Donald Trump's campaign to use partisan redistricting to help Republicans keep control of Congress in next year's midterm elections.

North Carolina Republican legislative leaders were poised Wednesday to complete a retooling of part of the state's U.S. House map in hopes of picking up an additional GOP seat and helping President D...