The Center for American Progress (CAP) is a public policy research and advocacy organization which presents a liberal viewpoint on economic and social issues. It has its headquarters in Washington, D.C.

A think tank, or policy institute, is a research institute that performs research and advocacy concerning topics such as social policy, political strategy, economics, military, technology, and culture. Most think tanks are non-governmental organizations, but some are semi-autonomous agencies within government, and some are associated with particular political parties, businesses or the military. Think tanks are often funded by individual donations, with many also accepting government grants.