Pew Research Center
"The Pew Research Center is a nonpartisan "fact tank" that provides information on the issues, attitudes and trends shaping America and the world. It does so by conducting public opinion polling and social science research; by reporting news and analyzing news coverage; and by holding forums and briefings. It does not take positions on policy issues.
The Center’s work is carried out by six projects:
- Pew Research Center for the People and the Press
- Pew Internet & American Life Project
- Pew Forum on Religion & Public Life
- Pew Hispanic Center
- Pew Global Attitudes Project
The Center is a non-profit, tax-exempt corporation which operates under Section 501(c)(3) of the Internal Revenue Service code. It was established in 2004 as a subsidiary of The Pew Charitable Trusts, a Philadelphia-based public charity." 
A survey by Pew in which media workers were asked to specify their own political affiliation was quoted last year (2004) as evidence that the media is controlled by liberals. This is a like finding that a large number of union members work in clothes factories and concluding that clothes factories are controlled by unions.