Who knows?

Maybe on Monday Canada’s Tories will pull off a surprise win the way their British counterparts did back in May when voters there confounded all the pollsters and a majority of the pundits by handing U.K. Prime Minister David Cameron an unexpected majority.

It could happen. A win for Prime Minister Stephen Harper and his Conservatives is not as far-fetched as it may seem.

Campaigns are increasingly decided in the final 72 hours.

It’s then that undecided and wavering voters make up their minds.

Knowing that, the Tories have a media-saturation blitz planned for regions of the country where the election outcome is in doubt, like Toronto and southern Ontario.

So maybe this weekend enough Canadians will give their collective heads a shake and pull back at the last minute from voting Liberal.

Maybe they’ll remember the Tories’ positive record on such things as economic management, family tax cuts, balanced budgets and national security.

Maybe they’ll recall how condescending the Liberals were during their decades in power and figure out how all that sneering elitism, deficit spending, group-hug defence policy, environmentalism and multiculturalism masquerading as anti-terrorism strategy would come flooding back under a Prime Minister Justin Trudeau.

Maybe. But I doubt it.

Four years ago, on the eve of the last federal election, I predicted a small Tory majority.

My email inbox instantly filled up with messages either hating me for thinking the country would elect a Harper majority or laughing at me for standing against the collective wisdom of pollsters and pundits.

This time I’d like to be able to predict a Tory majority, too, but I’m afraid I have to go along with the herd and bet on a Liberal minority.

I do think there will be enough last-minute voter pullback to prevent Trudeau and his party from winning a majority.

And the Tories’ get-out-the-vote organization is better, which means close races should fall to the Conservatives.

So at this point I don’t think the Liberals’ 37% poll support translates into a majority.

It’s not as well spread out — too concentrated in major cities — as the 40% that got the Harper Tories a majority last time.

But if the “change” vote continues to coalesce around the Liberals this weekend, as it has for the past 10 days, and if that pushes them into the 40% range, all bets are off.

If I sound as if I’m hedging, it’s because I am.

This is a much harder election to read than 2011.

This week I even had a senior Tory strategist ask me how I thought they were doing. That’s never happened before.

Harper and crew have always been so supremely sure they knew what every province was doing, every region, every riding, that they never sought outside validation.

So I take the question as a sign they’re worried this time, even if only a little.

And I come back to a theme I’ve hammered on in this campaign: The Tories haven’t done enough to give Canadians a reason to vote for them and not merely against the Liberals and NDP.

I think the Liberals have pulled away from the NDP among anti-Harper voters in the last two weeks because, despite their exceedingly vague platform, they’ve gone positive of late.

The Liberal ads featuring Trudeau pumping up a big rally are just about the only charismatic appeal to Canadians’ national pride employed by any party.

The Harper Tories have always believed cool calculation, wedge issues and technology were enough to win.

They have scoffed at suggestions that voters need to be wooed.

Monday, that disdain will likely come back to bite them.