While Green party Leader Elizabeth May has taken the train across Canada to Nova Scotia, campaigning at whistle stops, the incumbent in the riding of Central Nova has been walking door to door.

Conservative Peter MacKay, minister of defence when the Oct. 14 federal election was called, has been campaigning for 2½ weeks, but has seen only one other candidate, who's with the NDP.

"I haven't seen her," he said of May.

Green party officials on Saturday dismissed MacKay's "poor short-term memory," telling CBC News that the two candidates have run into each other on two occasions in the riding during the campaign.

May arrived in Halifax on Saturday following stops in New Brunswick and other parts of Nova Scotia. She hoped voters in Central Nova will be understanding.

She acknowledged she has been away, "but I'm also in the riding more than Peter MacKay most of the year, so I don't think it affects my chances."

May, who was greeted by about 80 party supporters waving banners and chanting her name, denied reports that she was urging party members to vote for any candidate who can bring down the Tories in the Oct. 14 election.

"It's a non-starter," she said inside the train station. "Strategic voting just doesn't work."

To further refute the suggestion, the Green party has distributed an internal e-mail to supporters explaining that the leader does not endorse strategic voting and wants them to vote Green.

Elsewhere, Conservative Leader Stephen Harper spoke in Ajax, Ont., on Saturday afternoon.

Liberal Leader Stéphane Dion was in Stoney Creek, Ont., and NDP Leader Jack Layton spoke to supporters in Vancouver.

Gilles Duceppe, the leader of the Bloc Québécois, is campaigning in Montreal.