"From day one, our strategy was to educate Congress, the FCC, and the general public on this issue," said David Wharton, EVP of media relations for the National Association of Broadcasters (NAB), which is leading a coalition against the merger on the grounds that it would create an illegal monopoly.
NAB created xmsiriusmonopoly.org, which contains various information against the merger.
XM is working with Joele Frank, Wilkinson Brimmer Katcher, which did not respond to requests for comment.
XM and Sirius argue the merger will ultimately give consumers more choices in the long run.
XM VP of corporate affairs Chance Patterson declined to comment, and Sirius did not return a call before press time.
The NAB is running its campaign primarily in-house, assisted by unnamed outside agencies.
Opponents are appealing to the public's inherent distaste for monopolies, said Wharton.