Indeed, my hope was that the OP would see the post in time to make it to a passport office today before they closed since it was the most realistic 'new document' option to still fly on Sunday.computergeek said:Any WHTI identification is sufficient to get across the border: Passport, Passport card, Nexus Card, or Enhanced Drivers License/Licence to name several. Of course, a Canadian PR card is enough to get back into Canada as well.
At this point it's not likely one could obtain a second US passport before next Tuesday due to the US President's Day holiday in any case.
At this point, assuming the OP is a US citizen, the Enhanced DL is probably be the only viable option left to get before Sunday and that has lots of if's (the OP would need to live in one of the four states that offer it - Michigan, New York, Vermont and Washington - there would need to be an open DMV open Saturday and they would need to be able/willing to issue it without the passport). And, it would require flying to a border city (since they aren't valid for air travel).