Identifying the "Special Interest Groups"

"The special interest groups putting the most money into campaigns this year are almost all on the left and contributing to Democrats, despite scare articles put out by the New York Times and others focusing on contributions by the moderate U.S. Chamber of Commerce. The number of unions alone listed as top contributors is alarming."[...]"What is most disturbing about this is that government is now indirectly the largest special interest group influencing elections. How did this union [AFSCME] get to be so powerful? Through gradual expansion of the size of government. Now that AFSCME has become this powerful, it has enormous influence ensuring that government remains bloated and continues expanding."... - Rachel Alexander
Top All-Time Donors, 1989-2010: List