Changing nature of immigration to Canada from the U.S. detailed in new report / An inside look at Canada's largest immigration holding centre / Canada's immigration strategy: How reduced targets can preserve positive attitudes / Canadian consensus on immigration under threat, but not gone: immigration minister / Canada's immigration model is coming under strain / This undocumented migrant comes out from shadows to urge Canada to keep promises of permanent residency / Amid migrant surge, Canada's Trudeau says immigration there needs to be brought 'under control' / Cap on foreign students: Canadian immigration experts respond