The party was dormant until January 1985 when Carignan stepped aside to allow André Asselin, a lawyer, mayor of the small town of Ste-Émilie-de-l'Énergie, and president of the Quebec Union of Regional Municipal Councils, to become party leader. However, Brian Mulroney told the press following a meeting with Quebec Liberal Party leader Robert Bourassa that he did not support the creation of a provincial Conservative Party at the time. By the 1980s, the conservative Union Nationale was no longer a contender for office and in terminal decline - though it rebuffed an offer by Asselin for a merger with his Conservative Party. After making an impression in a June 1985 by-election in which Asselin placed second with 30% of the vote in L'Assomption, the party nominated 48 candidates for the December 1985 provincial election but failed to make a major impact, receiving 1.03% popular vote. Asselin blamed the party's poor showing on what he called deliberate sabotage by federal Tory officials who discouraged Conservatives from giving money or otherwise becoming identified with the provincial group.
Asselin resigned as party leader in 1989 leaving Robert Coppenrath to lead the party into the 1989 election where it ran 12 candidates and received 0.14% of the vote. Hundreds of thousands of dollars in debt, the party disbanded shortly afterward.