100 biggest givers in American politics since 1989:
Top 10 donors:
AT&T Inc - $40,838,395
American Fedn of State, County & Municipal Employees - $40,690,630
National Assn of Realtors - $34,635,003
Goldman Sachs - $30,878,682
American Assn for Justice - $30,103,429
Intl Brotherhood of Electrical Workers - $29,684,341
National Education Assn - $29,624,876
Laborers Union - $27,797,489
Service Employees International Union - $27,363,922
Carpenters & Joiners Union - $26,789,808
