Stephen Harper starts his day in Markham, Ont., campaigning in the riding of Oak Ridges-Markham to help shore up support for incumbent Conservative Paul Calandra.
The Conservative leader makes an announcement at manufacturer Novo Plastics in Markham.
On Wednesday night, Mr. Harper attends a riding for Tory candidates across the Greater Toronto Area. It's taking place in the riding of Ajax-Pickering, where Tory candidate Chris Alexander is trying to unseat incumbent Liberal Mark Holland.
Michael Ignatieff, the Liberal leader, is touring the Eastern Townships Wednesday.
After walking up in Premier Jean Charest's Sherbrooke riding, the Liberal campaign heads to Compton, where Mr. Ignatieff visits an agricultural co-op, then on to Orford for a phot op. He ends the day with a rally in Brossard, a riding held by Liberal MP Alexandra Mendes, who is in a tight race with her Bloc opponent.
NDP Leader Jack Layton is in Prince George, B.C., where his party hopes to make gains at the expense of the Conservatives.
Long-time Conservative Jay Hill won Prince George-Peace River in 2008 with more that 60 per cent of the vote. But Mr. Hill has retired and the NDP, who came second last time, hope his departure improves their chances.
Meanwhile, in the neighbouring riding of Cariboo-Prince George, which is also held by a Conservative, former Liberal candidate Drew Adamick has endorsed the NDP.
Mr. Layton will make a policy announcement in Prince George in the morning and then will fly to Cranbrook, B.C., for a rally with supporters in the evening.
Bloc Québécois Leader Gilles Duceppe will be in the Gaspésie on Wednesday, spending the first half of the day on the mainland dealing with fisheries issues, before flying over to the Magdalene Islands for an early evening rally.