Perhaps they’ve learned from a recent US administration that “National Security” is a very broad brush, which is hard to contradict, and thus is an easy card to

Perhaps they’ve learned from a recent US administration that “National Security” is a very broad brush, which is hard to contradict, and thus is an easy card to play when you don’t want to reveal your actual motives! [1] 1. https://www.bbc.com/news/world-us-canada-53683569 https://www.bbc.com/news/world-us-canada-53683569