Skyrocketing US tuition rates, overwhelming student debt rates and other social factors are adding to this trend of US students attending Canadian universities. This is a trend for US Universities to closely follow due to enrollment decreases now and predicted for future. In addition to this trend, the US universities are seeing large decreases in international student enrollment.
https://psmag.com/education/more-american-students-are-being-lured-to-canadian-universities