Sauri: You're probably correct that most of the unauthorized migrants now crossing the border into Canada who had entered the U.S. on visas will eventually be determined not to be refugees. But that's not the point. While pursuing their refugee claims they will be eligible for costly social programs and services and will strain an already underresourced refugee adjudication system. And even if denied status will they leave Canada? Many probably won't do so on their own and I understand that Canada's removal record isn't stellar.