 Complete the following phrase:  After the Coalition was defeated at the 1972 election, Fraser unsuccessfully stood for the Liberal leadership, losing to Billy Snedden. When the party lost the 1974 election, he began to move against Snedden, eventually mounting a successful challenge in March 1975. As Leader of the Opposition, Fraser used the Coalitions control of the Senate to block supply to the Whitlam Government, precipitating 