Take context from the input text and decide on the accurate relationship between 'Campbell Newman' and 'Mayor' from the options provided.
Options: legal form, position held, parent organization, stock exchange

Despite his impressive CV as Liberal National Party campaign director in Queensland – which delivered a landslide to Campbell Newman in 2012 – and stints working as a gun for hire overseas including for London Mayor Boris Johnson, the extremely private Senator McGrath flew below the radar in his first 12 months in Canberra.
position held