Opponents of Missouri’s new congressional map have submitted thousands of petition signatures calling for a statewide referendum on the plan backed by President Donald Trump. Organizers of the petition drive said they turned in about 300,000 signatures Tuesday to the secretary of state’s office. That’s well more than the roughly 110,000 signatures needed to suspend the U.S. House districts from taking effect until a public vote can be held next year. But the signatures still must be formally verified by election authorities. Republicans hope the new voting districts could help their party win additional seats in Congress in next year’s midterm elections.