OTTAWA — On the eve of the 1995 referendum vote in Quebec, Preston Manning rose in the House of Commons to ask the Liberal government of the day how it might be willing to change to convince a “soft sovereigntist or a discontented federalist” to vote against leaving the country. More than three decades later, the former Reform party leader is asking the same question, this time about Alberta. “The question with respect to remain is: remain and do what?” he told National Post in an interview on Tuesday. “That’s the question that the remain people have to answer.” Alberta Premier...