Voters are heading back to the polls for a byelection in the federal riding of Terrebonne on Monday, just under a year after one of the closest and most disputed election results in Canadian history.

In last year’s general election, Terrebonne was called for Liberal Tatiana Auguste by just one vote, flipping the riding from incumbent Bloc Québécois MP Nathalie Sinclair-Desgagné.

The Supreme Court of Canada nullified the result earlier this year after a challenge from the Bloc over a ballot processing error, which the party said would have resulted in a tie.

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Auguste and Sinclair-Desgagné are facing off again in a rematch that is expected to be close once more.

Conservative candidate Adrienne Charles, New Democrat candidate Maxime Beaudoin and Green Party candidate Benjamin Rankin are also all seeking the riding for a second time.

Nearly four dozen other candidates are also on the ballot, thanks to a campaign by the Longest Ballot Committee that is pushing for electoral reform.

2:05
Terrebonne candidates expect a tight race leading up to April 13 federal byelection

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Voters in the federal riding of Scarborough Southwest will choose their first new member of Parliament in more than a decade in Monday’s byelection.

The Toronto-area riding had been held since 2015 by Liberal MP Bill Blair, the former Toronto police chief who served as public safety minister and defence minister under former prime minister Justin Trudeau.

Blair resigned earlier this year to serve as Canada’s high commissioner to the United Kingdom.

The Liberals have nominated former Ontario New Democratic Party deputy leader and MPP Doly Begum as their candidate to potentially succeed Blair. Begum resigned from the Ontario NDP after accepting the Liberal nomination.

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She will face off against Conservative candidate Diana Filipova, NDP candidate Fatima Shaban and Green Party candidate Pooja Malhotra.

The riding has been held by the Liberals since its creation in the 1990s with the exception of the NDP’s Dan Harris, who flipped the riding in the 2011 “orange wave” election.

Scarborough Southwest sits on the shore of Lake Ontario and encompasses parts of Scarborough Village and other neighbourhoods in the Scarborough district of Toronto.

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Breaking down the federal byelections

&copy 2026 Global News, a division of Corus Entertainment Inc.