Blue's previous political involvement included service on a District Health Board as an elected member from the centre-right Citizens and Ratepayers Now organisation.

In her first term as an Opposition MP, Blue had responsibilities as the spokeswoman for the National Party on women's issues, as well as associate health.

Subsequent to her election to Parliament, Blue strongly advocated for further available health care for sufferers of breast cancer, including wider use of the anti-cancer drug Herceptin.

[citation needed] In 2006, Blue's Human Tissue (Organ Donation) Amendment Bill was drawn from the member's ballot.

[citation needed] Blue was appointed Equal Employment Opportunities Commissioner at the Human Rights Commission in April 2013[2] and took up the position in June 2013.