Christopher Luxon doubles down on MMP referendum while Chris Bishop says it’s not party policy StuffChristopher Luxon promises MMP referendum if re-elected, Winston Peters calls it a ‘power grab’ RNZNational in disarray over Luxon’s sudden bombshell MMP comments NZ HeraldDunne believes PM’s frustration with NZ First, ACT behind MMP call 1news.co.nzChristopher Luxon goes off the cuff – again thepost.co.nz