On September 12, the Missouri legislature passed HB 1, the bill to change the boundaries of U.S. House districts. Also on September 12, some Kansas City voters filed a lawsuit in state court, alleging that the new boundaries, and the very process of redrawing them in the middle of the decade, violates the Missouri Constitution. Wise v State of Missouri, Circuit Court, Jackson County, 2516-cv29597.
It’s possible that the referendum process might be used against the new districts, although that takes a difficult petition.