Conservative Leader Andrew Scheer was put on the defensive at the beginning of the first French-language debate of this election campaign, as he was pressed to elaborate on his personal views about abortion.

鈥淨uebecers can be confident that a Conservative government would not reopen this debate,鈥� Scheer said Wednesday night during the debate hosted by the private TVA television network and the Montreal newspaper Le Journal.

Scheer was pushed to clarify his stance on abortion this summer after it emerged that his Quebec lieutenant, Alain Rayes, had told candidates in the province that backbench MPs would not be allowed to bring forward any bills or motions on the issue.

That goes against party policy and created confusion until Scheer, a practising Catholic who has voted in favour of restricting abortion rights in the past, said he would oppose any attempt to reopen the debate should he become prime minister.

Scheer repeated that position on stage again Wednesday night, but his political rivals pressed him to go further.

That included Liberal Leader Justin Trudeau, who asked him directly whether he personally believes women should have the right to abortion.

鈥淚 have always been open about my personal views,鈥� Scheer said.

Four federal leaders are trying to make their mark with voters on Wednesday night as they take the stage for the first time all together for the first time in this campaign, which has so far shown little movement in popular opinion polls despite weeks of big-ticket promises and controversies.

Scheer, New Democrat Jagmeet Singh, and Yves-Francois Blanchet of the Bloc Quebecois are facing off along with Trudeau.

It鈥檚 the first time Trudeau has taken the stage for a debate during this campaign and the stakes are high as all four leaders seek to win over voters in a province that could ultimately decide which party gets to form government after Oct. 21.

Speaking to reporters while touring the historic Atwater Market before disappearing behind closed doors for several hours of debate prep, Singh said his main opponent in the debate would be 鈥渃ynicism.鈥�

鈥淎 lot of Canadians feel let down by Mr. Trudeau,鈥� he said. 鈥淭hey feel that they had a lot of hope and a lot excitement about things that were offered and then a lot of promises were broken and people now don鈥檛 really feel that same hope and same excitement about voting.鈥�

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The reality is none of the federal parties have seen much movement 鈥� either gains or losses 鈥� in opinion polls despite weeks of campaigning, which some experts attribute variously to a degree of comfort with the status quo as well as a rise in public disillusionment and strategic voting.

The Liberals and Conservatives remain locked in a fight for first place, hovering around 33 per cent support nationally, but with the Liberals apparently having a small edge because so much Conservative support is concentrated in the Prairie provinces.

A strong Liberal showing in Quebec, where polls show them with a small but consequential lead, could sustain the Liberals in power; a strong Conservative showing could sink them.

Trudeau was able to ride a wave of unhappiness with a decade of Conservative rule under Stephen Harper to power in 2015 in an election campaign that saw the NDP start in the lead before giving way to the Tories only until voters rallied behind the Liberals to give them the win.

Four years later, Trudeau鈥檚 record in office 鈥� including his broken promise on electoral reform and decision to purchase the Trans Mountain pipeline 鈥� has turned off many of those same voters, especially progressives, who cast their ballots for the Liberals.

Despite that disappointment with Trudeau, Christian Bourque, executive vice-president of polling firm Leger, said there does not seem to be the same type of overwhelming drive for change that existed in 2015, when a majority of Canadians were ready for a new direction.

鈥淪o there鈥檚 this sort of comfort with the current government, even though some may be disappointed with the leader,鈥� Bourque said. 鈥淪o there鈥檚 no urge for that amount of change. And at the same time, there鈥檚 nobody convincing them of the need for change on the other side.鈥�

That speaks to another problem for both the Liberals and Conservatives: both Trudeau and Scheer are trailing their respective parties in popularity, making them liabilities rather than assets on the campaign trail.

Yet none of the other party leaders has been able to capitalize. Both Bourque and McMaster University assistant professor Clifton van der Linden, whose company Vox Pop Labs created the Vote Compass election tool, believe is a reflection of a rise in strategic voting in Canada.

鈥淲hat鈥檚 interesting is that even though you do see fluctuations in evaluations of party leadership, those aren鈥檛 necessarily translating into vote swing,鈥� said van der Linden.

鈥淪o a lot of people are locked into their positions, and I don鈥檛 think it鈥檚 driven by affinity for the leaders themselves. I think in many cases it鈥檚 sort of a pragmatic calculus on the part of Canadian voters in this campaign.鈥�

That would help explain why the NDP, for example, has failed to make much progress despite Singh having run what many believe to be a smooth campaign to this point: progressive voters are worried about the Conservatives and sticking with the Liberals.

Complicating matters for all the parties is that their policy proposals aren鈥檛 very different from each other, said Bourque, noting each has promised a combination of tax cuts and more spending when it comes to affordability and helping Canadian make ends meet.

Where there are stark differences, such as on climate change, they are largely between the Conservatives and those proposed by the Liberals, the NDP and the Greens, each of whom has promised to make it a priority.

鈥淪o it鈥檚 not forcing people to coalesce on the centre to left of the political spectrum,鈥� Bourque said.

Of course, even though it is past the halfway mark, the election campaign is far from over and Wednesday鈥檚 French-language debate was seen as an key opportunity for the four participating leaders to talk directly to Quebecers, in particular, and start gaining some momentum.

And momentum often begets momentum, said van der Linden, who noted the NDP benefited from a surprise 鈥渙range wave鈥� in 2011 in Quebec, where many voters still haven鈥檛 decided who to support 鈥� underlining the importance of Wednesday鈥檚 debate.

鈥淭he real volatility always happens at the end of the race, because you have undecideds who aren鈥檛 factored into polling numbers,鈥� he said.

鈥淎nd I think regional Quebec is a very volatile region in terms of where those votes will go. So (Wednesday鈥檚) debate could be really instructive as to how regional Quebec is going to swing, and that could determine the ultimate makeup of the next government.鈥�

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