According to the NYT, affordable housing is one criterion and that rules out New York and the Bay area. So  it must rule out Toronto and  Vancouver as well. Another is a million plus people. So Ottawa is barely in the running on that one, but well behind the NYT's choice of Denver. As for Montreal, great city, but language laws will stop Amazon  dead. Moral: don't bother  making concessions in NAFTA negotiations for Amazon.  You don't have a hope.