Walmart said late Wednesday it is suspending membership in the American Legislative Council (ALEC), which the retailer joined in 1993. By Reuters ROGERS, Ark. -- Walmart Stores (WMT), the world's No. 1 retailer and the biggest seller of firearms in the United States, is dropping out of a U.S. conservative advocacy group that has been a lightning rod over voting and gun laws. Walmart said late Wednesday it is suspending membership in the American Legislative Council (ALEC), which the retailer joined in 1993. ALEC sparked controversy recently because of its involvement in voting laws and in "stand your ground" gun laws, including the one under scrutiny in the Florida killing of unarmed 17-year-old Trayvon Martin in February. A coalition of liberal advocates targeted the group for its support of the self-defense laws. ALEC, which serves as a forum for corporations and mostly Republican state lawmakers and lobbyists to discuss model legislation, has been criticized by liberals for promoting laws that require photo identification to vote. ColorOfChange, a liberal advocacy group for black Americans, has said the voting laws put the poor and minorities at a disadvantage. In April, ALEC said it was abandoning the committee that worked on "public safety and elections" to focus on the economy. Despite the change, Walmart decided it was no longer focused on the same issues as the council.