India, Aug. 5 -- Missouri Secretary of State Denny Hoskins has officially blocked a citizen-initiated referendum designed to overturn the state's contentious Republican-backed congressional map, setting off a fierce legal and political showdown as voters head to the polls for critical primary elections.

The controversial decision prevents the anti-gerrymandering measure from appearing on the November ballot, despite voting advocacy groups submitting more than 305,000 signatures to challenge the newly drawn district boundaries. The move has drawn immediate condemnation from civil rights organisations and legal experts, who argue that state authorities are actively undermining public participation to secure partisan advantages in alignment...