Canada: I am holding two passports, but I only use my EU passport for?
Actually after asking this question, I went to USA on my EU passport and they even did not bother to ask about any other identity. I have been to USA on my other (Non-USA, Non-EU) passport before and they knew at the time of entry about my other passport (Being part of a special community I am accustomed to random checks :) ). But they did not ask me to present my expired identity as they were able to establish who I am based on my EU passport. After some routine checks I went through quite fine.