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.
“You know the green grifters have no argument when they start raising the 'no blood for oil' cry on the blogs. Excuse me, if Obama's make-sure-your-tires-are-properly-inflated administration would simply allow more energy production here in the U.S., that wouldn't be a problem very long, would it?”
“If the Union is once severed, the line of separation will grow wider and wider, and the controversies which are now debated and settled in the halls of legislation will then be tried in fields of battle and determined by the sword.”