From the press release:
Voters in six states chose to raise their state’s minimum wage in 2006 through ballot measures that generated nearly $14.4 million in political donations, a new report finds.
Although more than 950 contributors chipped in money, 31 gave in more than one state and accounted for 41 percent of the total given, the study by the National Institute on Money in State Politics discovered. These contributors were led by the National Education Association (NEA), which spread $963,000 across four states. In total, labor unions were responsible for nearly two-thirds of the money given by these contributors.
Business interests, which generally opposed wage hikes, accounted for 41 percent — or $5.9 million — of the $14.4 million, while labor organizations, which supported wage increases, contributed 34 percent of the total, or $4.9 million.