Mostly this problem is contained in the fact that the US makes it so difficult for Canadians to get green cards (you heard it here), but if an American orchestra really wants a player, they have their ways.
“My strength as an actor is in the theater - I know that about myself. Some actors get onstage and vanish, but I'm much better there than I am on screen.”
“I don't know what other people are like, I haven't been able to crawl inside anybody else.”