Originally Posted by
Nayef
You use the NEXUS card for travel by land or sea (if they have NEXUS lanes/facilities). It also has your known traveler number and you can use it as an ID to travel domestically within the US and Canada. Even though you can't use it on a kiosk (in the US anyway), it's still proof that you have NEXUS privileges. I'd wager you should be able to use your Canadian PR card in GE kiosks in US airports, but I'd rather someone else verify that piece of information.
I have NEXUS as a Canadian PR holder with a foreign passport. You present your foreign passport at the GE kiosks in the US and it works flawlessly.
The agent was possibly talking about NEXUS land-entry, where even with valid NEXUS you still need to get a US entry visa approved and stamped and paid for every 3 months (for my Swiss passport at least it's 3 months not sure about you). Otherwise works fine.