[Christien]

Actually, if I'm not mistaken, it's as much of a problem coming the other way, which is to say it's not really a problem in either direction. Mexicans enter the US illegally to get jobs paid in a currency much stronger than their own. There's not the same disparity between US and CDN currency (and the gap is closing day by day), and there's not the shortage of jobs here that you find in Mexico. Those that leave Canada for the US for vocational reasons are doing so for higher pay. These are (mostly) doctors and other professionals, not fruit pickers.

And yes, Canadians go south for health care, but they pay for it. It's not like they're taking advantage of the US health system. If anything, they're benefitting it.