Ok how 'bout this?
Early in May 1993, Mulroney begins to get cold feet in regards to his coming retirement. After talking to a number of yes men he begins to seriously consider running in the upcoming 1993 election. However his attempts to "un-retire" are met with hostility leading him to concede to be regulated to one of the participants in the upcoming leadership convention.
Campbell takes Mulroney's change of heart badly and launches an energetic campaign along with a few others. Unsurprisingly Campbell wins the convention on the first ballot. Promising a "New Day For Canada" there's an even bigger wave of "Campbellmania" than in OTL. With only a few months until the upcoming election Campbell begins to prepare for what's sure to be a tough contest.
Mulroney's betrayal having left a bad taste in her mouth, Campbell is determined to come out from Mulroney's shadow. This means a radical reshuffling of her campaign managers, ditching old Mulroney loyalists and bringing in fresh blood. Veteran campaign manager Rick Anderson is lured from the Reform party through a few dirty tricks that turn the more stalwart reformers against him. Anderson proves to be an excellent campaigner and oversees the publication of the PC "Canadian Agenda" platform before that of the Liberals.
Despite having capitalized on her initial momentum and run a far better campaign, Campbell still struggles during the election to get out from under Mulroney's shadow. Nevertheless by making Mulroney out to be a pariah, Campbell gains some traction, and this coupled with other factors and a good performance in the debates leads to a narrow minority government for the Tories, who have to rely on the Western based Reform party for support. Campbell, in order to promote stability forms a coalition cabinet with Reform and pursues what is effectively a Reformed Agenda during her initial term in office.