I'm also a Canadian working in the US on a TN1 visa. Mexicans can work in the US on a TN2 visa but my understanding is that it's harder to apply for than a TN1.

I'm also a Canadian working in the US on a TN1 visa. Mexicans can work in the US on a TN2 visa but my understanding is that it's harder to apply for than a TN1. As a Canadian you don't need to do the border crossing to renew your TN. The mail in process is more expensive and takes about 2 months. I'd guess the TN2 process is more like this option.