It will not adversely affect the petition on the terribly backlogged waiting list as the sister of a U.S. citizen. They will continue to keep you on the waiting list by your country of birth and not by your new country of citizenship. It will not speed up your immigration case if you become a citizen of Canada. If a Mexican entered onto the waiting list by registering as the sister of a U.S. citizen prior to June 15, 1996, a U.S. immigrant visa number is only available today. This...