• Project of the American Progress Action Fund, a “sister advocacy organization” of the Center for American Progress (CAP) run by former Clinton adviser John Podesta
• Internet website dedicated to promoting “progressive” ideas, attacking the “Radical Right-Wing Agenda,” and supporting the left wing of the Democratic Party

Think Progress is a "project" of the American Progress Action Fund (APAF), a "sister advocacy organization" of the John Podesta-led Center for American Progress (CAP) and CAP's entities such as Campus Progress. It also draws freely on the resources of the George Soros-funded Media Matters website edited by David Brock.

Think Progress is an Internet blog that "pushes back, daily," by its own account, against its conservative targets, and supports the APAF agenda: to transform "progressive ideas into policy through rapid response communications, legislative action, grassroots organizing and advocacy, and partnerships with other progressive leaders throughout the country and the world." Think Progress promotes an agenda identical to that of the left wing of the Democratic Party.

"What We're Fighting For," says the Think Progress website, are: "Social and Economic Justice," "Healthy Communities," "Global Leadership" and "A Secure America."  These terms are code for an agenda that is anti-capitalist, suspicious of the American military, obsessed with multilateral restraints on U.S. power, and distributionist in domestic fiscal matters.

"What We're Fighting Against," says the Think Progress website, are: "Corrupt Establishment," "Incompetent Establishment," "Braindead Media," and "Radical Right-Wing Agenda.”

The editors and main bloggers of Think Progress are Judd Legum and Christy Harvey. 

Legum is the Research Director at the Center for American Progress and Co-Editor of The Progress Report, an APAF publication of news and commentary that Legum claims is emailed each weekday to 60,000 "progressive" readers. Harvey is Director of Strategic Communications at the Center for American Progress and Co-Editor of The Progress Report. She is a regular guest on Air America Radio's The Al Franken Show. 

Legum and Harvey co-authored a January 2005 article with Jonathan Baskin titled "The Death Squad Option" that suggested American troops were wantonly killing or kidnapping suspect Iraqis. Drawing a parallel with Reagan policy in El Salvador in the 1980s, the authors cited a 1993 United Nations-sponsored "truth commission" report claiming that up to "90 percent of the atrocities in the conflict" were committed by the U.S.-sponsored "death squads.” "Faced with an intractable insurgency in Iraq," wrote Legum, Harvey and Baskin, "the Pentagon is returning to its bad old ways."

CAP Fellow David Sirota, who also writes for Think Progress, worked for two years as chief spokesman for Democrats on the U.S. House Appropriations Committee. Prior to that he was spokesman for independent Vermont Congressman Bernie Sanders, a member of the Democratic Socialists of America (DSA), the main American branch of the Socialist International and the founder of the Progressive Caucus in the House of Representatives.