In 1961, the CIA wrote an intelligence estimate titled "Trends in Canadian Foreign Policy" which suggested that the Progressive Conservative government of John Diefenbaker "might take Canada in a divergent direction" and seek "a more independent foreign policy" and suggested that a return of the Liberal Party might "soften the Canadian resistance to the storage of nuclear weapons on Canadian soil".[13] In 1967, Prime Minister Lester Pearson announced he would investigate the allegations of the CIA helping him oust Diefenbaker.[14]