I am not sure about the Nexus card, but I am also a US citizen and I went back home last year the first time I applied for PR (had to withdraw and now starting over ). You will need your OWP to show customs when crossing back into Canada. Since you are now a temporary resident, you obviously do not have a length of stay to put on the customs form so they will need proof of your status in Canada.Travel question..I'm a US citizen and have a 7 day trip back to the States coming up this month (I just received my OWP as far as the PR process goes). I enrolled in the Nexus program several years ago to make life easier when visiting my husband here. When coming into Canada I always use my Nexus card to skip the customs line. Am I still alright to enter with my Nexus card throughout the PR process? I'm just wondering since technically now I'm a temporary resident if entering with the Nexus card implies I'm coming in as a visitor or something? Also - do I need to travel with the original OWP for entry purposes at all? TIA!