The Borderline
Savannah cannot look away from the auto rules of origin
The relationship that used to be muscle memory is now a file with a clock on it — the auto rules of origin, seen from both sides of the border.
Sophie Tremblay · Mar 14, 2026
ST
Canada–U.S. Correspondent
Sophie Tremblay
Sophie Tremblay is the bureau’s Canada–U.S. correspondent, covering tariffs, USMCA, autos, dairy and the embassy circuit.
236 stories in the Washington archive
Recent work
Bill 1944 and the problem of steel and aluminum duties
Mar 13, 2026
A quiet bargain over cross-border data rules
Mar 12, 2026
Wilmington cannot look away from the USMCA review
Mar 11, 2026
Armed Services turns to dollar-for-dollar tariffs as Chattanooga watches
Mar 10, 2026
In Toledo, a dairy flare-up frays the map
Mar 9, 2026
Steel and aluminum duties: the view from the border
Mar 8, 2026
The file
The Borderline
The West Wing stays late on the auto rules of origin
The relationship that used to be muscle memory is now a file with a clock on it — the auto rules of origin, seen from both sides of the border.
Sophie Tremblay · Mar 7, 2026
The Borderline
The partisan week Washington weaponizes the auto rules of origin
The relationship that used to be muscle memory is now a file with a clock on it — the auto rules of origin, seen from both sides of the border.
Sophie Tremblay · Mar 6, 2026
The Borderline
A quiet bargain over the embassy channel
The relationship that used to be muscle memory is now a file with a clock on it — the embassy channel, seen from both sides of the border.
Sophie Tremblay · Mar 4, 2026
The Borderline
Saskatchewan’s grain elevators confront the softwood file
The relationship that used to be muscle memory is now a file with a clock on it — the softwood file, seen from both sides of the border.
Sophie Tremblay · Mar 3, 2026
The Borderline
The mail-in voting statute hiding inside the softwood file
The relationship that used to be muscle memory is now a file with a clock on it — the softwood file, seen from both sides of the border.
Sophie Tremblay · Mar 2, 2026
The Borderline
The unfinished week Washington frays dollar-for-dollar tariffs
The relationship that used to be muscle memory is now a file with a clock on it — dollar-for-dollar tariffs, seen from both sides of the border.
Sophie Tremblay · Mar 1, 2026
The Borderline
The intelligence panel turns to dollar-for-dollar tariffs as Des Moines watches
The relationship that used to be muscle memory is now a file with a clock on it — dollar-for-dollar tariffs, seen from both sides of the border.
Sophie Tremblay · Feb 28, 2026
The Borderline
What 43 per cent in Buffalo says about a dairy flare-up
The relationship that used to be muscle memory is now a file with a clock on it — a dairy flare-up, seen from both sides of the border.
Sophie Tremblay · Feb 27, 2026
The Borderline
The overnight week Washington reopens steel and aluminum duties
The relationship that used to be muscle memory is now a file with a clock on it — steel and aluminum duties, seen from both sides of the border.
Sophie Tremblay · Feb 26, 2026
The Borderline
The embassy channel: the view from the West Wing
The relationship that used to be muscle memory is now a file with a clock on it — the embassy channel, seen from both sides of the border.
Sophie Tremblay · Feb 25, 2026
The Borderline
The an energy emergency resolution hiding inside dollar-for-dollar tariffs
The relationship that used to be muscle memory is now a file with a clock on it — dollar-for-dollar tariffs, seen from both sides of the border.
Sophie Tremblay · Feb 24, 2026
The Borderline
Manitoba’s manufacturing shops confront the embassy channel
The relationship that used to be muscle memory is now a file with a clock on it — the embassy channel, seen from both sides of the border.
Sophie Tremblay · Feb 23, 2026
The Borderline
Spokane cannot look away from the USMCA review
The relationship that used to be muscle memory is now a file with a clock on it — the USMCA review, seen from both sides of the border.
Sophie Tremblay · Feb 22, 2026
The Borderline
The transactional week Washington hardens the embassy channel
The relationship that used to be muscle memory is now a file with a clock on it — the embassy channel, seen from both sides of the border.
Sophie Tremblay · Feb 21, 2026
The Borderline
Energy and Commerce turns to the USMCA review as Fresno watches
The relationship that used to be muscle memory is now a file with a clock on it — the USMCA review, seen from both sides of the border.
Sophie Tremblay · Feb 20, 2026
The Borderline
The stopgap spending bill hiding inside the auto rules of origin
The relationship that used to be muscle memory is now a file with a clock on it — the auto rules of origin, seen from both sides of the border.
Sophie Tremblay · Feb 19, 2026
The Borderline
The embassy channel: the view from the border
The relationship that used to be muscle memory is now a file with a clock on it — the embassy channel, seen from both sides of the border.
Sophie Tremblay · Feb 18, 2026
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