http://www.theglobeandmail.com/globe-investor/purolator-shakeup-sparks-talk-of-closer-ties-with-fedex/article1814174/
"In April, Canada Post hosted a special dinner in Ottawa for 15 top U.S. and Canadian FedEx executives. Also at the dinner were three Canadian cabinet ministers, including Finance Minister Jim Flaherty and John Baird, the government house leader, who then was transport minister."
Purolator is currently represented by the Teamsters. Fed Ex, to my knowledge, remains a non union courier company.