A single vote, a Supreme Court decision: Why this riding is voting again

https://i.cbc.ca/ais/28918286-580d-4935-92aa-2b7e5fa78d67,1776116844064/full/max/0/default.jpg?im=Crop%2Crect%3D%280%2C0%2C1280%2C720%29%3BResize%3D%28620%29" title="A voter heads to the polls." width="620" />

Terrebonne is one of three federal ridings holding a byelection on Monday.

But unlike the two ridings in Toronto, this byelection isn’t over a vacant seat.