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After an unprecedented 11-week federal election campaign, Albertans will help make history Monday as they cast their ballots.

If the Conservatives win, Calgary’s Stephen Harper will have extended his decade in office and pulled off a rare feat in Canadian politics — four straight election victories as prime minister.

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But Harper faces the threat of being unseated by Liberal Leader Justin Trudeau — the son of a former prime minister — while the leader of a party that has never held power nationally — the NDP’s Tom Mulcair — also retains hope for an upset.

Mount Royal University political analyst David Taras said whatever the outcome, there has never in modern times been such a competitive federal race in Alberta.

“Normally it was a slam dunk, a shut out,” Taras said of previous elections.

“Conservatives never had to look over their shoulder … they never had to wonder the day before an election who would win.”