Department of Labor / National Coalition on Health Care and America / Michigan Education Association / Mackinac Center / Mackinac Center for Public Policy / American Federation of State / County / and Municipal Employees / International Brotherhood of Teamsters / Michigan Republican Party / Mackinac Center for Public Policy Union Spending / United Brotherhood of Carpenters and Joiners / Service Employees International Union / rightMackinac Center for Public Policy / Civil Service Commission / Mackinac Center for Public Policy Midland / Economic Policy Institute / National Education Association / /