

Depends on by whom and how long. The US produces a lot of things but also imports a lot of critical goods and materials as well.
If Canada, Mexico, China, and the EU & UK all banded together for sanctions or embargoes? The US economy would be pushing daisies pretty quick. Especially if the actions were coordinated and did not give the US time to react and adjust.
But the countries issuing those actions wouldn’t be in good shape either. Trade wars are a 2-way street.
And also the large reason the Cons were polling so far in the lead is because of Trudeau fatigue.
Now that he’s gone things have balanced out again.