At 5,525 miles, it is the longest border between any two countries.
And that border — separating the United States and Canada — seems set to become a flashpoint between the close allies as President-elect Donald J. Trump prepares to take power.
The Canadian authorities fear that Mr. Trump’s promised mass deportations will push migrants north, while allies of the incoming president headed for key roles in his administration have raised alarms over a recent spike in undocumented migrants crossing from Canada to the United States.
The northern border is also a focus of people named to top positions in the Trump administration, including his new border czar, Tom Homan.
He has described the frontier as a major security vulnerability because of what he described as insufficient checks on people entering the United States.
Persons:
Donald J, Trump, Trump’s, Tom Homan
Organizations:
New York State
Locations:
United States, Canada, New, Quebec