The National Energy Policy of the early 1980s attempted to make Canada oil-sufficient and to ensure equal supply and price of oil in all parts of Canada, especially for the eastern manufacturing base. This policy proved deeply divisive as it forced Alberta to sell low-priced oil to eastern Canada. The policy was eliminated 5 years after it was first announced amid a collapse of oil prices in 1985. The new Prime Minister Brian Mulroney had campaigned against the policy in the 1984 Canadian federal election. One of the most controversial sections of the Canada–United States Free Trade Agreement of 1988 was a promise that Canada would never charge the United States more for energy than fellow Canadians.