Your COPR covers your status in Canada.... for Re-entry, you should be able to come in even with an expired TRV so far you did not go outside the USA.Thank you for the response. My question is not validity of visa to enter into USA but validity of my status when I enter Canada back as I will not have PR card with me. And to the extent I know, they will cancel all my existing Canada visas including Visitor and Work Permit that I currently have.