sentences:  A Liberal, he was re-elected in 1963 election and the 1965 election.In 1964 he filed a lawsuit against the Canadian Broadcasting Corporation after it converted its secondary Toronto station CJBC to an affiliate of the francophone Radio-Canada network, arguing that since the French language had no legal status outside of Quebec, the station's conversion to French was inappropriate and illegal; however, his case was dismissed by the Ontario Supreme Court in 1965 on the grounds that Cowan did not have legal standing and could not show material harm from the format change.Although a Liberal, Cowan was considered a renegade and often voted against his own caucus; most notably, he filibustered both Lawrence Pennell's 1967 bill to abolish capital punishment in Canada and the 1968 Broadcasting Act, and opposed Justice Minister Pierre Trudeau's 1968 revisions to the Criminal Code, including the decriminalization of homosexuality and abortion.