I have the following tough situation which would like to get your kind suggestions!
My previous TN visa was expired in last June. My current company sent the renew application of my TN visa by mail to Nebraska till to May, so far it is still in processing. Now I get another job and need to apply for a new TN visa. As probably I will take a business trip outside of USA very soon after joining the new company, so I'd like to go to Detroit to apply for new TN visa at border directly next Tuesday, I don't and could not wait for another half a year. As I have NOT valid I-94 card (TN visa) at hand now, before I leave US port, will I need to talk to US Custom officer to explain my current visa status? Or after I come back from Windsor to Detroit, will I have any trouble because I have NO valid US visa at hand? Very appreciated in advance for your quick response!