I prefer to go by Polymarket after how inaccurate polling has been in recent years.
According to Polymarket Pierre has slipped quite a bit(more than 10%), but still sizeable lead as odds of winning next election.
Pierre 61%
Carney 39%
https://polymarket.com/event/next-prime-minster-of-canada?tid=1740544824563
Carney was at 30% yesterday. I didn’t see it, but he must’ve had a good debate tonight.