So I have a TN (as it happens). If you are looking to get a TN as a Canadian citizen (rather than Mexican, different rules apply for them) you can actually app

So I have a TN (as it happens). If you are looking to get a TN as a Canadian citizen (rather than Mexican, different rules apply for them) you can actually apply for a TN at any airport (not just via Canada). This is a little known fact. The advice given to me was just to take a trip somewhere and come back into the country to get the TN rather than apply for an AoS with the DHS (which can take ages to process - they are not really incentivized to process it with a short turnover). I got my most recent TN at SFO in secondary checking, it was trivial (assuming you qualify + your paperwork is in order, etc).