A&E Television Networks planned to air the miniseries on the History channel, but announced last month "after viewing the final product in its totality, we have concluded this dramatic interpretation is not a fit for the History brand."
The Hollywood Reporter said the decision to cancel its broadcast was made in response to pressure from the Kennedy family.
"We think it will drive ratings and put a spotlight on this network that has never been on it before," ReelzChannel Chief Executive Officer Stan Hubbard told the entertainment industry trade newspaper. "We're going to do a full-blown marketing campaign."
Hubbard went on to say a benefit of being an independent network is that "you can be an independent voice and you don't have to worry about corporate pressure or political pressure."
"This is a project that deserves to be seen," Hubbard said.