綠黨
Three parties — the Conservatives, the Bloc Québécois and the NDP — opposed the inclusion of the Green Party, citing statements made by Green Party leader Elizabeth May to the effect that the best outcome of the election would be a Liberal-led government, and a deal struck between the Green Party and Liberals where the Liberals would not run in May's riding, Central Nova, and the Green party in Liberal leader Stéphane Dion's riding, Saint-Laurent—Cartierville, which they say make May a "second Liberal candidate".