He made several attempts , including the Victoria Charter in 1971 and more proposed amendments in 1978 .
In 1968 , Pearson was succeeded by Pierre Trudeau , who also advocated patriation .
Pearson made several attempts , including the Victoria Charter in 1971 and more proposed amendments in 1978 .
In 1968 , Pearson was succeeded by Pierre Trudeau , who also advocated patriation .