"Washington Post" staff writer Marilyn Berger reported that Nixon White House staffer Ken Clawson had bragged to her about authoring the letter. Clawson denied Berger's account. In October 1972, FBI investigators asserted that the Canuck Letter was part of the dirty tricks campaign against Democrats orchestrated by the Committee for the Re-Election of the President. Loeb, the publisher of the "Manchester Union Leader", maintained that the letter was not a fabrication, but later admitted to having some doubt, however, after receiving another letter claiming that someone had been paid $1,000 to write the Canuck Letter. The purported author, Paul Morrison of Deerfield Beach, Florida, was never found.