The Association of Missouri Electrical Cooperatives filed suit Wednesday morning in federal district court challenging changes to campaign finance laws that became effective December 8.

Voters approved the changes via a constitutional amendment on the November ballot. Among other things, the amendment establishes contribution limits for individuals and entities supporting statewide and judicial candidates, as well as prohibits certain corporate and labor union contributions.

The Association of Missouri Electrical Cooperatives unsuccessfully attempted to block the statewide referendum prior the November election; an appeals court stopped its lawsuit because it would not consider campaign restrictions not yet in effect. The new suit alleges the campaign finance changes violate free speech rights as they unfairly limit some businesses and associations from participating in political campaigns.