Originally Posted by
tryinginvain
I crossed back to Canada at Ogdensburg last week and since there was nobody waiting behind me I specifically asked the CBP agent this question after he cleared me to leave. He said I didn't need my passport and the nexus card was sufficient.
That said, I always bring it and probably will continue to do so until this is more clearly stated. I've not been asked for it on the 10 or so land crossing (back & forth) I've done since I received my nexus.
The rules are different for land crossings and airports. The info you received is correct for a land crossing but at an airport, you must have your passport with you.