Conservative Leader Pierre Poilievre announced that, if elected, he would use the notwithstanding clause, also known as the Parliamentary supremacy clause or Section 33, to override a Supreme Court decision that struck down “stacked” periods of parole ineligibility for mass murderers. The Harper-era Criminal Code provision was found unconstitutional by the court in 2022 over the case of Quebec City mosque shooter Alexandre Bissonnette, whose life sentence without parole for 40 years was found to have contravened the Charter of Rights and Freedoms.