Heber Blankenhorn was a member of CPI. Another journalist, he headed what appears to be a sub-group of the CPI known as G-2-D, which is giving me problems finding out more. But this is important because Blankenhorn worked with Lippmann in this organization.
Ray Stannard Baker, was a journalist and CPI member.
Wallace Irwin and William Henry Irwin were both journalists and CPI members.
William Allen White is considered one of the greatest journalists of all time. Member of CPI.
L. Ames Brown(Philadelphia Record), J W McConaughy(NY Evening Mail), Leigh Reilly(Chicago Herald),and Edward S Rochester(Washington Post) were all plucked from various places within the media and became members of the CPI.
There were plenty of other names which I couldn't find anything online about, so there could be more. The internet does have limits in this respect. There are also others who were writers of various things, and other activist types within CPI. But with respect to those who are supposed to be looking out for us, this betrayal that we live with today is nothing new. It's always been a widespread problem of reporters choosing to help and protect the powers that be, instead of questioning those they should be questioning.
Journalists being associated with propaganda is hardly an American phenomena either. Karl Marx was a journalist. Who was Joseph Goebbels before he became Joseph Goebbels?(everybody knows of him only as a nazi propagandist) Before this most infamous work, he was a journalist. All of these people knew how powerful the written(and now spoken) word is. Hey, could I interest you in an audiobook?