What politician worked with Vidar Helgesen and was the Leader of the Conservative Party?
Vidar Helgesen: Vidar Helgesen (born 21 November 1968) is a Norwegian diplomat and politician for the Conservative party. Vidar Helgesen:  He was appointed Minister of Climate and the Environment on 16 December 2015, having served as Chief of Staff to Prime Minister Erna Solberg from 2013 to 2015. Erna Solberg: Erna Solberg (] ; born 24 February 1961) is a Norwegian politician who has been Prime Minister of Norway since October 2013 and Leader of the Conservative Party since May 2004.
Erna Solberg