Dogwhistle politics are being used to exploit some ugly undercurrents in the immigration debate, Tasha Kheiriddin says.

Canadian officials in Nigeria are working with the U.S. on developing tools to flag Nigerians applying for U.S. visas who may be at "high risk" of crossing illegally into Canada across the U.S. border.

The Conservatives are doubling down on their call for the Liberals to crack down and put an end to the flow.