Byelection results round-up: Who won in four federal races last night?

Voters in four federal ridings had their say on Monday, voting in new members of Parliament in Quebec, Ontario, and Manitoba. Heading in to election day, two of the seats were Liberal-held, and two were Conservative-held. Who came out on top? And, what do the margins of victory suggest about Canadians' shifting support?

Voters in four federal ridings had their say on Monday, voting in new members of Parliament in the ridings of Notre-Dame-de-Grâce–Westmount, Que., Oxford, Ont., Portage–Lisgar, Man., and Winnipeg South Centre, Man.

While overall the seat count in the House of Commons isn't changing, seeing the Liberals hold on to the two ridings they won in 2021 and the Conservatives keeping the two others, the margins of victory offer some interesting indications about Canadians' shifting support.

Here's a riding-by-riding breakdown of Monday's results:

Who won? Liberal Anna Gainey

What was formerly Liberal Marc Garneau's seat, now belongs to past Liberal Party president Gainey.

After having long list of high-profile Liberal ministers and party members come to help her knock on doors and rally supporters, including Prime Minister Justin Trudeau, Gainey held the Liberal stronghold handily and is now being looked at as a potential cabinet contender.

Gainey secured 50.8 per cent of the vote, compared to Garneau's 53.8 per cent in 2021. Potentially playing a factor in the results in this riding was an issue that arose on the campaign trail: the federal government's handling of language law changes and Anglophone minority rights.