It could hardly take ALL countries at the same time.
The thing is, 2 years ago, or even really 6 months ago the idea that Trump would become president would have seemed as likely as some evil over Lord taking over the EU. Even in November we were being reassured that Trump shouldn't be taken literally. Even now it doesn't seem real.
As I said, I am a Remainer, but while I think it's fair to say that Leavers should always have been worried about the effect of a US trade deal on the NHS, (even with a democrat in charge), I don't think it's fair to expect them to have predicted Trump.
The reality is that only a minority voted for Nigel Farage's Brexit. (Because half voted remain and a lot of leavers hate Farage). We need unity to stand up to Trump.