Luxon shakes up cabinet, campaign in NZ election year

Chris Luxon has sacked senior minister Chris Bishop as the NZ National party's campaign chair. (Ben McKay/AAP PHOTOS)

Under-pressure New Zealand Prime Minister Chris Luxon has moved to exert authority on his party months out from an election, shaking up his campaign head.

Mr Luxon has sacked senior minister Chris Bishop as the National party's campaign chair, promoting health minister Simeon Brown into the role.