The meeting, held in Saint-Lambert on Montreal's south shore, is important for the candidates because people under the age of 25 represent nearly one-third of the votes at the party's general meeting to elect the next leader.
Kevin-Alexandre Lavoie, president of the Youth Commission, encouraged people in attendance to share their ideas with the four leadership candidates.
Former finance minister Raymond Bachand and former health minister Philippe Couillard shared a few harsh words during the first hour of the presentation when Bachand was asked to explain comments he made about Couillard on Saturday.
Saturday, Bachand said Couillard had shown a lack of decency in 2007 when he attempted to overthrow former leader Jean Charest.
Bachand said there were no hard feelings and that the incident was in the past.
Pierre Moreau took a jab at the Parti Québécois by telling his counterparts to "get back to a debate of ideas" and telling them that the Liberal Party was not like the PQ.
Lavoie said the members of the congress can take part in the campaign of their choice and support the whoever they want. He said many people had already picked their sides and are actively participating in their campaigns.