A member of the Liberal Party of Australia since 1988, Michaelia Cash was elected to the Senate of the Parliament of Australia as a Senator for Western Australia at the federal election held on 24 November 2007.

Cash was re-elected in 2013 and appointed a Minister in the new Liberal National Party government led by Tony Abbott. She holds the positions of Minister Assisting the Prime Minister for Women and Assistant Minister for Immigration and Border Protection.

A solicitor by profession, prior to her election to the Senate Cash worked at the law firm Freehills between 1999 and 2008. Her father, George Cash, served as a Liberal MP and MLC in the Western Australian state government for many years.