Prime Minister Justin Trudeau visits Vince’s Market, a grocery store in Sharon, Ontario, on Thursday November 21, 2024. The government on Thursday announced a sweeping promise to make goods like groceries, children's clothing, Christmas trees and restaurant meals free from GST/HST between Dec. 14 and Feb. 15.

It's not clear how the Liberal government is going to salvage its plan to deliver on its promise of a GST holiday and $250 cheques for some Canadians now that some opposition parties are demanding changes that could dramatically increase the cost.