The debate in Canada over whether to implement the negotiated agreement was very contentious. The opposition Liberal Party of Canada under leader John Turner vociferously opposed the agreement, saying that he would "tear it up" if he became prime minister. The opposition New Democratic Party under leader Ed Broadbent also strongly opposed the agreement. Both parties objected that the agreement would erode Canadian sovereignty, arguing that Canada would effectively become the "51st state" of the US if the agreement was implemented. They also raised concerns about how Canada's social programs and other trade agreements such as the Auto Pact would be affected.