I read the title of the thread and thought you were talking about Mexicans....
Sponsoring Canadians in US bases...pisses me off. I'd love be based in Toronto and fly the 777. But... CAN NOT since I am US Citizen, and YES I have the Seniority.. Fair? I think NOT.
It is strange since there are a bunch of DEFO's (US and junior to me) that are in Toronto... it is all a mess.. Seniority means NADA...CX does as it wants, when it wants, how it wants..PERIOD.