Bearing in mind that the agreement was reached under a previous U.S. administration, you did mention where some of your members may be from and what their religious beliefs are, so it's safe to say that you and your union share our concerns about the Trump administration's approach and how that may be applied with whatever derogatory information is being provided and the way that the U.S. Department of Homeland Security might treat someone based on their background versus how the Government of Canada and Transport Canada, the current regime, would.
Evidence of meeting #66 for Public Safety and National Security in the 42nd Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was pre-clearance.
A recording is available from Parliament.