The US Chamber of Commerce is a conservative lobbying organization. They have a name that is intentionally misleading, so that when they are cited by name many people think they are a government agency and not a group of lobbying hacks. Here's what they really are:
The United States Chamber of Commerce (USCC) is an American lobbying group representing the interests of many businesses and trade associations. It is not an agency of the United States government.
The Chamber is staffed with policy specialists, lobbyists and lawyers. Politically, the Chamber is generally considered to be a conservative organization. It usually supports Republican political candidates, though it has occasionally supported conservative Democrats.[1][2] The Chamber is one of the largest lobbying groups in the U.S., spending more money than any other lobbying organization on a yearly basis.[3][4]
http://en.wikipedia.org/wiki/United_...er_of_Commerce