sentences:  He was expelled from the Liberal Party caucus in March 1968 after voting against the government's tax bill, but fought to retain his rights as a voting party member at the 1968 Liberal Party of Canada leadership convention, and pledged that he would continue to support the government if it faced a motion of non-confidence.He ran in the 1968 federal election as an Independent Liberal in High Park after being expelled from caucus, but was defeated by Liberal candidate Walter Deakon.Following his federal defeat, Cowan attempted to intervene in the 1969 York municipal election, alleging that mayor Jack Mould had a personal financial interest in a construction company whose tax arrears had been written off by York's municipal council.