Its all about the money.
Check this out:

In a late Friday afternoon news dump, The Center for American Progress published a list of their 2013 corporate donors, who each contributed $10,000 or more to CAP’s $42 million budget.

Chicago native and founder John D. Podesta — former President Bill Clinton’s final chief of staff — will join the Obama administration early next year as a special senior advisor, prompting calls for CAP to release the full list of its corporate donors.

CAP was quick to play down the donors’ influence on research projects.

“American Progress receives more than 90 percent of its funding from individuals and foundations,” a statement issued with the donors list read. “Funding from corporations makes up less than 6 percent of funding for the Center for American Progress and less than 3 percent of funding for the Center for American Progress Action Fund. Corporate donations do not fund new research.”