Canadian officials and experts believe that the jump in illegal crossings has been fueled primarily by immigrants arriving in Canada from India on tourism or other temporary visas.

In his threat to slap hefty tariffs on Canadian and Mexican imports to the U.S., president-elect Donald Trump lumped together the border issues of the two nations. Experts and politicians say it's an apples-to-oranges comparison.

Justin Trudeau, Canada's prime minister, told reporters on Tuesday that he had a "good" conversation with Trump following the president-elect's post.