Avi Lewis won the NDP leadership race to succeed Jagmeet Singh Sunday, winning on the first ballot with 56% of the vote. The decisive win signals the party is choosing a more openly left-wing path as it tries to recover from a historic setback in the last election.
The NDP Past & Present
The New Democrat Party is Canada’s social-democratic party, rooted in the Co-operative Commonweath Federation (CCF) tradition associated with Tommy Douglas. Historically focused on labour rights and, at times, socialist ideals, the party has long been seen as Canada’s social conscience, but rarely a viable player for power, even though the NDP formed the Official Opposition after the 2011 election.
After the 2025 federal election, the NDP sank to a distant forth place in the House of Commons, with just seven seats – and one of those MPs later crossed the floor to the Liberals. To wield real power in Parliament, a party needs to win at least 12 seats to receive official party status, bringing guaranteed question-period slots, committee seats, and resources. While a small caucus can still matter in a minority Parliament, its influence is weaker and less visible. And, depending on the outcome of upcoming by-elections, the Liberals might soon upgrade from a minority to majority government, further weakening the NDP’s influence.
Who is Avi Lewis?
Avi Lewis is a longtime activist from a prominent NDP family: he is the son of former Ontario NDP leader Stephen Lewis and the grandson of former federal NDP leader David Lewis. He has hosted TV programs, made documentaries, and helped launch the left-wing Leap Manifesto in 2015.
In the leadership race, Lewis ran as the candidate of climate action, inequality reduction, and economic transformation, including a Green New Deal-style agenda. His campaign argued that the NDP should be bolder rather than cautious, and his win shows that many members preferred that direction over Heather McPherson’s more electorally cautious pitch.
The New Ideological Context in Canadian Politics
Lewis’s victory likely pushes the federal NDP further left, with a stronger emphasis on social justice, climate action, and wealth redistribution. While the Conservatives occupy the right, the Mark Carney-led Liberals hold much of the centre and, in the eyes of some, portions of the centre-right of Canada’s political ideological spectrum. That has freed up room, in theory, on the centre-left for the NDP. But rather than occupy this space, Lewis and his backers have instead chosen a clear left-wing ideological lane that embraces economic socialism. The upside is sharper identity and more enthusiasm among activists; the downside is a tougher challenge winning back mainstream voters in the short term, especially while Lewis still lacks a seat in the House of Commons.
NDP Comeback or Collapse?
Lewis’s win highlights a real split inside the NDP between the historic labor-worker-rights wing of the party and the increasingly strong urban-social-justice wing. Those tensions are likely to grow because some provincial New Democrats, especially in Alberta and Saskatchewan, have to deal with resource-development politics very differently from the federal activist left.
Lewis’s victory could cost the party seats in the Prairies while allowing the NDP to reconnect with voters in places like Vancouver, Toronto, and parts of Montreal. Quebec, of course, remains a weakness if the new leader and the party cannot improve its French-language presence.
So, the big question is whether Lewis can build a new coalition or if his vision is too polarizing for even his own party, further reducing the NDP’s presence in Canadian federal politics.
Lewis’s NDP and the Greens
Lewis’s long association with the Leap Manifesto and a Green New Deal agenda ties him closely to the activist wing of the environmental left. That could make the NDP more competitive with environmentally minded voters, but it also risks overlapping with the Greens instead of broadening the base. A formal merger is possible to imagine, but there is no evidence yet that either party is near that step. For now, the more realistic possibility is strategic competition or issue-based cooperation.
Lewis’s NDP and the Liberals
Lewis gives the Liberals a sharper progressive critic on their left flank, especially on climate, inequality, and economic justice. But since he does not yet sit in the House of Commons, that pressure on Mark Carney’s government will be mostly outside Parliament for now.
Still, if the NDP regains momentum, some centre-left Liberal MPs could become more vulnerable to a stronger anti-poverty, pro-climate message. In other words, Lewis could force the Liberals to defend their progressive credibility more actively even if he cannot challenge them in Parliament immediately.
Lewis’s NDP and the Conservatives
Lewis’s win may also help Pierre Poilievre’s Conservatives who have increasingly been focused on wooing union workers. If the labour wing of the NDP feels alienated by Avi Lewis’s new direction, it will be easier for Conservatives to argue they are best able to build and protect union jobs, especially in the resource sector. This matters, interestingly, as many Canadian voters swing between the Tories and the NDP.
On the flip side, Lewis’s populist language about wealth redistribution and living standards could let him compete for some disaffected Tory voters too. So, the result could either sharpen a three-way fight or fragment the anti-Liberal vote even further.
Take Home Message
Avi Lewis’s leadership victory is both a political party’s comeback attempt and a gamble, because it gives the NDP a clear identity, but it also raises the risk that the party becomes more inspiring to activists than broadly competitive in national politics.
A Final (Editorial) Note
Why is this leadership race only a write-up and not a full video? Good question! Nature Labs covers all political movements, but we focus on the parties who have a realistic chance to form government: the Liberals and the Conservatives.
While many media outlets give equal space to the three major English political movements, the reality is that the polls tell us the Canadian electorate – at least right now – is not evenly divided between the three parties. As such, to give equal coverage to a party that does not receive federal support at the level of the Conservatives or Liberals feels wrong.
Though we’d love to provide deeper insights on all movements – even the smaller parties – we have made the decision to concentrate our resources on the major players, while still highlighting (like this post) news from the Bloc Québécois, the NDP, the Greens, and the PPC.
We review our editorial decisions frequently and as Canada changes, so too will we.