Yeah, why would Canada of all places be concerned about possible icing in a new system on an airplane? /SThe Gulfstream aircraft were already in the process of being certified, so he was going to get it anyways. There was zero reason to throw a hissy fit. All Trump's antics do is reinforce the need to further disengage with the US in the long run.
As for why they haven't been certified, these aircraft have a new fuel system so Transport Canada and the FAA wanted more testing to properly verify it. The FAA gave Gulfstream a temporary certification while the testing is being done, while Transport Canada decided to wait for the results. Nothing illegal or malicious.
https://www.flightglobal.com/airfra...fuel-icing-certification-rules/156570.article
https://globalnews.ca/news/11645326/donald-trump-bombardier-gulfstream-tariffs/
Seriously, it's a no-brainer.