Susan Christine Knowles (born 10 April 1951) is an Australian former politician who served as a Senator for Western Australia from 1984 to 2005, representing the Liberal Party.
[3] In August 1994 she publicly opposed new opposition leader Alexander Downer's decision to sack Hewson from the shadow ministry.
[5] In 1995, Knowles came into conflict with her Liberal colleague Noel Crichton-Browne over allegations that he had been violent towards his wife several years earlier.
[9] In 1999, the disciplinary committee of the WA Liberals voted to expel Knowles from the party over unnamed complaints, apparently due to the continued influence of Crichton-Browne.
[9] Other federal MPs and Premier Richard Court opposed the committee's recommendation, and it was subsequently rejected by the party's state council.