Haven't heard about the North American dream," Mr. Summers, until this.  As North America includes 3 countries including the so-called "developing nation" of Mexico, I suggest there is no overriding "dream."

Perhaps the author copped the phrase from "The American Dream" (but, as her piece pertains to Canada, this didn't fit, so...)

In any case, the "promise"--whatever that was--died some time ago.  Read more: Who Stole The American Dream; Requiem For the American Dream; The Betrayal of the American Dream. Given who is in the White House, we likely are now living "The American Nightmare."