Expired PR card, can we still cross border?

[mpwright]

My mother is a landed immigrant to Canada and has been for 32 years. My husband and I have been planning a family weekend just across the border in New York and want my mum to come with us but her PR card has expired recently. We were hoping to get one last trip to the US in before the new border laws take effect June 1st. Will she be able to cross the border with the expired card? Or will we be going without her?

[Leon]

She may be able to go to the US with her passport, they do not care about the PR card but she may have problems coming back.  Other peoples experience is that they may get pulled out of the line and questioned about why they didn't get their PR card renewed but then they are let in.  One was told that it's getting really common now that the first PR cards are starting to expire that people don't realize it and travel on an expired card.