As of today you can go to Toronto Pearson Airport for your flights to the US. You can clear US customs and immigration right before you get on the plane to come to some US destination.
With the Scott Walker wall in place, you will be required to fly from Toronto to Milwaukee, Wisconsin. You and your fellow passengers will be met by a representative of Governor Walker. You will be lead to a processing area. You will required to put your hand over your heart and pledge allegiance to the US flag. You will then be questioned at length about your political ideology and thoughts. You will be required to go through a Bible study class. If you pass all of these ideological check points, you will be given an autographed copy of an Ann Coulter book and sent on to your connecting flights to other American cities.
Let us hope that this is just a bad dream that we awaken from relieved that it is not real. Ironically the Israelis do interview passengers upon their arrival at major Israeli airports. Elena went through it once. The Israeli screening is conducted by interrogators with intense training in psychology.. These people are looking for those with a profile of a terrorist. They do catch some real bad people with these interviews, by the way.