Erna Solberg published her memoirs on Thursday, renewing her criticism of supposed centre-right ally Sylvi Listhaug. The attack is striking: Listhaug’s Progress Party polls at 37 per cent, against the Conservatives’ 15 per cent. While former Progress Party leader Siv Jensen sought to unite the centre-right, Solberg accuses Listhaug of doing the opposite, deepening divisions and casting doubt on the future of centre-right cooperation in Norwegian politics.