Moreau ran unsuccessfully for the leadership of the Quebec Liberal Party in 2013, coming second to Philippe Couillard.

On 7 April 2014, Pierre Moreau was re-elected for a third consecutive term in Châteauguay in an election where the Liberals formed a majority government.

Pierre Moreau was, re-elected as MNA for Châteauguay in the general election held on 4 September 2012 and appointed as Official Opposition House Leader on 9 April 2013.

Sébastien Proulx replaced Hélène David as Minister of Higher Education and Lucie Charlebois was responsible for Montérégie until his return to work on 19 January 2017.

[2] Moreau was said by some pundits to be the heir apparent to the PLQ leadership until he lost his Chateauguay seat in the Quebec general election, 2018.