Conservatives Lose Another MP as Gladu Crosses to Liberals: What the Path to a Majority Means for Canadians

What This Means for You

Canada's political landscape shifted significantly on April 8, and the practical implications for Canadians are substantial. With the Liberals now holding 171 seats — just one short of a bare majority — and three byelections scheduled for April 13, the next five days could determine whether the Carney government gains the ability to pass legislation without relying on any opposition support. Based on our analysis, here's exactly what this means depending on your situation.

If You Live in a Byelection Riding

Three ridings vote on Monday, April 13, 2026, and the stakes have never been higher for these contests:

University–Rosedale (Toronto):

This riding opened up when former Deputy Prime Minister Chrystia Freeland resigned. It is considered a safe Liberal seat.
Your vote matters more than usual because it contributes directly to the majority math. Even in a "safe" riding, turnout determines the margin and the political narrative.
Advance polls are already closed. If you haven't voted yet, mark Monday, April 13 on your calendar. Polls are open from 9:30 a.m. to 9:30 p.m. ET.
Find your polling station at elections.ca.

Scarborough Southwest (Toronto):

Vacated by former Public Safety Minister Bill Blair. Also considered a safe Liberal seat.
Same logistics apply: Monday, April 13, regular polling hours.

Terrebonne (Quebec):

This is the critical swing seat. The Liberals won it by a single vote in the 2025 general election before the result was annulled by the Supreme Court of Canada on February 13, 2026.
The riding has 48 candidates on the ballot, including an "adapted ballot" format due to the high number. According to The Hill Times, the Liberals are "throwing everything at that seat."
Advance poll turnout sat at roughly 20%, according to CP24 — significantly lower than general election levels. If you live here and care about the outcome, showing up on Monday is critical.
Practical tip: With 48 candidates, the ballot will be longer than usual. Familiarize yourself with the candidates beforehand at elections.ca so you can vote efficiently and avoid delays.

If You Care About Legislative Outcomes

Here's the seat math and why it matters for policy:

Current standing after Gladu's floor crossing: 171 Liberal seats out of 343 total (with 3 vacancies).

What the Liberals need:

172 seats = bare technical majority when all seats are filled, but since the Speaker (a Liberal) does not typically vote, they would still need opposition cooperation on tight votes.
173 seats = a working majority where the government can pass legislation with only its own MPs voting, even with the Speaker abstaining.
174 seats (sweep all three byelections) = a comfortable working majority with a one-seat cushion.

What this means for policy: A majority Liberal government would no longer need NDP or Bloc Québécois support to pass budgets, trade legislation, or other key bills. Based on our analysis of the Carney government's agenda, the policies most likely to move faster with a majority include:

Trade diversification legislation — Carney has made reducing dependence on U.S. exports a centrepiece of his government. A majority removes the need to negotiate with the NDP on the terms.
Defence spending increases — The government has signalled significant new defence investment. Opposition parties have been split on the scope and pace.
Infrastructure megaprojects — Several major projects (LNG terminals, mines, transit) could see faster legislative approval.
Budget 2026 — The fiscal impulse is estimated at more than 2% of GDP, according to Oxford Economics — the largest since 1980 outside of the pandemic. A majority makes this easier to pass without amendments from opposition parties.

If You're Concerned About Democratic Representation

The Gladu floor crossing raises important questions about how our democratic system works:

The core issue: Marilyn Gladu was elected in Sarnia—Lambton—Bkejwanong as a Conservative. Her constituents voted for a Conservative representative. She has now joined the Liberals without giving those voters a say.

What you can do:

Contact your MP to express your views on floor-crossing legislation. There have been at least five private member's bills attempting to require byelections when MPs switch parties, but none have passed. The most recent was Bill C-306, which would have mandated a byelection whenever an MP joins a different registered party.
Know your rights: Currently, there is no federal mechanism to recall an MP in Canada. Only British Columbia and Alberta have recall legislation at the provincial level. Your next opportunity to weigh in on Gladu's representation is at the next general election.
Understand the precedent: According to CTV News, there have been approximately 194 floor crossings since Confederation. This is not a new phenomenon, but five defections to the governing party in five months is an unusually concentrated pattern.

Gladu's own position on record: In January 2026, Gladu herself stated that floor-crossers should face voters in a byelection. Conservative Leader Pierre Poilievre highlighted this on social media, writing "I could not agree more" and calling on her to "honour her word" by resigning her seat. As of this writing, Gladu has not indicated any intention to trigger a byelection.

If You're a Conservative Voter

The pattern of Conservative MPs leaving the party raises practical questions:

Four Conservative MPs have crossed to the Liberals since November 2025, including Chris d'Entremont. According to The Deep Dive, internal polling suggests up to 40 Conservative MPs fear electoral defeat under Poilievre's leadership.
What to watch: If the Liberals secure a majority on April 13, the pressure on Poilievre intensifies. The Conservative Party's next scheduled leadership review could become a flashpoint for internal debate about direction.
Your riding association still matters. Even if your MP has crossed the floor, your local Conservative riding association continues to operate and will nominate a candidate for the next general election. Get involved locally if you want to influence the party's direction.

For All Canadians: The Bigger Picture

Regardless of your political leanings, a shift from minority to majority government changes how Ottawa operates:

Legislation moves faster — no more negotiating bill-by-bill with opposition parties.
Committee dynamics shift — the government gains control of House committees, which oversee investigations, spending reviews, and legislation amendments.
Confidence votes become routine — the government no longer faces the risk of being defeated on a budget or throne speech vote.
Accountability mechanisms weaken — opposition parties lose their primary leverage tool (threatening to bring down the government). Scrutiny shifts more heavily to the Senate, the media, and public opinion.

We recommend all Canadians pay close attention to the April 13 byelection results. The outcomes will shape the legislative agenda for the remainder of this Parliament.

The News: What Happened

According to CBC News, longtime Conservative MP Marilyn Gladu announced on Wednesday, April 8, 2026, that she is crossing the floor to join the Liberal caucus. Gladu, who represents the riding of Sarnia—Lambton—Bkejwanong in southwestern Ontario, is the fifth MP to join the Liberal ranks in as many months and the fourth Conservative to do so, as reported by CTV News.

In a statement to her constituents, Gladu wrote that she heard from the community "that you want serious leadership and a real plan to build a stronger and more independent Canadian economy," according to CBC News. She cited the need for a "serious leader" who can address the uncertainty caused by American tariffs.

According to CP24, the defection brings the Liberals to 171 seats — one short of the 172 needed for a slim majority when all 343 seats in the House of Commons are filled. However, three byelections on April 13 in University–Rosedale, Scarborough Southwest, and Terrebonne could bring the Liberal count to as high as 174 if they sweep all three contests.

Conservative Leader Pierre Poilievre responded on social media by pointing to Gladu's own January 2026 comments that floor-crossers should face voters in a byelection, writing "I could not agree more" and calling on her to resign her seat, as reported by Global News. Poilievre accused Prime Minister Mark Carney of "seizing a costly Liberal majority that voters denied him" through "backroom deals."

Analysis: Why This Matters

A Pattern, Not an Isolated Event

Based on our analysis, Gladu's defection is significant not as a single event but as part of an accelerating pattern. Five MPs crossing to the governing party in five months — four of them from the Official Opposition — is historically unusual. While floor crossings are common in Canadian parliamentary history (approximately 194 since Confederation, according to CTV News), this concentration suggests deeper structural issues within the Conservative caucus.

The practical reality is that each defection both strengthens the government's hand and weakens the opposition's ability to hold it accountable. For the Carney government, the strategic value is clear: each crossing brings them closer to legislative independence without having to win a general election.

The Terrebonne Wildcard

The two Toronto byelections are widely expected to go Liberal. The real drama is in Terrebonne, Quebec, where the Liberals won by a single vote in 2025 before the result was annulled. With 48 candidates on the ballot — an extraordinary number that could split the vote in unpredictable ways — this riding could determine whether Carney governs with a comfortable majority or remains dependent on the thin margin that floor crossings have provided.

According to The Hill Times, the Liberals are investing heavily in Terrebonne, recognizing that a win there provides the cushion they need. The Bloc Québécois, which held the riding before 2025, is also fighting hard to reclaim it.

What Happens Next

April 13: Byelection day in three ridings. Results will likely be known by late evening.
Late April: The House of Commons resumes sitting. If the Liberals have a majority, expect a faster legislative calendar.
Spring 2026: Budget 2026 becomes the first major test of whether a Liberal majority translates into bolder fiscal policy.

Your Action Plan

Immediate (This Week):

If you live in University–Rosedale, Scarborough Southwest, or Terrebonne: confirm your voter registration at elections.ca and plan to vote on Monday, April 13
Review candidates in your byelection riding — especially in Terrebonne, where 48 candidates make advance research essential

Short-term (This Month):

Watch for byelection results on the evening of April 13 — they will signal the government's legislative power for the rest of this Parliament
If you have strong views on floor-crossing rules, contact your MP about supporting legislation requiring byelections when MPs switch parties

Long-term (This Year):

Track the government's legislative agenda — a majority government can move faster on trade, defence, and infrastructure legislation
Stay informed on Budget 2026, which will be the biggest fiscal package in decades and affects taxes, benefits, and public services for all Canadians

Other Perspectives

Government View:

Prime Minister Mark Carney stated that "what's important is that we command the confidence of the House," according to BNN Bloomberg. The Liberals have characterized each floor crossing as evidence that their economic agenda is attracting broad support, including from traditionally Conservative constituencies.

Conservative Opposition:

Pierre Poilievre accused Carney of "seizing a costly Liberal majority that voters denied him" through "backroom deals" with MPs from other parties, as reported by Global News. The Conservative leader has called for Gladu to resign and face voters in a byelection, pointing to her own previous statements supporting that principle.

Community Reaction:

According to CBC News, some residents of Sarnia expressed feelings of "shock" and "betrayal" at Gladu's decision. One constituent told CBC: "This is a Conservative riding, and this Liberal has no business being here." Others noted that Gladu was first elected in 2015 and had been a prominent Conservative voice in the region for over a decade.

Political Analysts:

According to CBC's analysis, Carney's Liberals are "attracting support from unlikely places," suggesting the floor crossings reflect both the government's political momentum and internal fractures within the Conservative caucus under Poilievre's leadership.

Note: Including multiple perspectives doesn't imply all views are equally valid, but ensures readers can make informed judgments.

Corrections Policy

We strive for accuracy. If you find an error in this analysis, please email us at [email protected]. We will promptly investigate and correct any factual inaccuracies.

Updates:

No corrections to date (as of April 9, 2026)

Sources

CBC News, "Former Conservative MP Marilyn Gladu crosses floor to Liberals," April 8, 2026
CTV News, "Floor crosser: Conservative Marilyn Gladu joins Carney Liberals," April 8, 2026
CP24, "Liberals one seat shy of a majority as Conservative MP Marilyn Gladu crosses the floor," April 8, 2026
Global News, "Ex-Conservative MP Marilyn Gladu crosses floor to Liberals," April 8, 2026
BNN Bloomberg, "Liberals one seat shy of a majority as Conservative MP Marilyn Gladu crosses the floor," April 8, 2026
CBC News, "Shock, betrayal among some Sarnia residents," April 8, 2026
CBC News, "Carney's Liberals are attracting support from unlikely places" (analysis), April 8, 2026
The Hill Times, "Grits 'throwing everything at that seat' as 48 candidates could influence Terrebonne byelection," April 6, 2026
CP24, "Pivotal Terrebonne byelection sees preliminary 20% voter turnout in advance polls," April 7, 2026
The Deep Dive, "Conservative MP Marilyn Gladu Defects to Liberals, Boosting Carney's Majority Hopes," April 8, 2026
CTV News, "Switching sides: A brief history of floor-crossing in Canada"
Elections Canada, "2026 By-elections," elections.ca