NDP Leader Jack Layton had his plane rerouted overnight because of the winter weather. Heavy snow fell overnight across much of Ontario.
Layton was headed to Windsor, Ont., but had to spend the night in Ottawa instead.
Liberal Leader Paul Martin is also scheduled to make a stop in Windsor, where he is to tour the DaimlerChrysler plant. He then plans to fly to Montreal where he'll meet with former U.S. president Bill Clinton at the closing of the UN climate conference there.
Stephen Harper will campaign for the Conservatives in Guelph, Cambridge and Hamilton. He'll be at a seniors home in the morning where he'll make an announcement.
Bloc Québécois Leader Gilles Duceppe is in Chicoutimi and Alma, Que.
Jim Harris of the Green party travels to Iqaluit on Friday.
