Having joined the National Party in 1976, he served as Chairman of the
New Zealand Young Nationals among other positions and became the then-youngest MP for
Waikato in the
1981 election. In the
1984 election, he was elected MP for
Raglan, which he held until the
1996 election, when he chose to become a
list MP.
Cabinet minister Upton became one of New Zealand's youngest ever Ministers in the
Cabinet in 1990, when he became
Minister of Health,
Minister for the Environment, and
Minister of Research, Science and Technology. As Environment minister, Upton promoted the enactment of the
Resource Management Act 1991. He was responsible for establishing the
Crown Research Institutes. One of Upton's most controversial actions whilst holding the health portfolio was introducing public hospital outpatient charges of up to $50 per night, this was later abandoned as the 1993 election approached. He also has an interest in
sustainable development, and chaired the
OECD's Round Table on Sustainable Development and is a founding member of the Board of the
Holcim Foundation for Sustainable Construction. Upton was sworn to the
Privy Council in 1999. After National was defeated at the 1999 election Upton was appointed Spokesperson for Foreign Affairs, Superannuation and Culture and Heritage by leader
Jenny Shipley. ==Life after politics==