Officials of a dozen top Big Green environmental groups contributed more than $14.5 million to congressional and presidential candidates in 2008 and through the second quarter of 2010 with 96 percent of the total going to Democrats, according to an Examiner analysis of federal campaign data.

The data was compiled from the Federal Election Commission and included only donations by individuals who listed one of the 12 groups as their employer or listed themselves as an officer or director of one or more of the groups. This analysis does not include contributions by individuals who did not list an employer.

The groups included the Audubon Society, Clean Water Action, Defenders of Wildlife, the Environmental Defense Action Fund, Friends of the Earth, League of Conservation Voters, Natural Resources Defense Council, Nature Conservancy, Ocean Champions, Sierra Club, the Trust for Public Land and the Wilderness Society.