Comment by YZF

Canadian employees visiting the united states is usually not a situation requiring a TN. That said most of the time this happens the visitors are indeed breaking the law. So one could argue that the current administration does believe in following the law.

One of the situations when I had a TN was exactly like that. Canadian employees of a US startup needed to get a TN so they're not hassled at the border.

Many administrations ago. Before the first Trump presidency.

Either way getting your Canadian employees TN status is easy and is probably a better solution.