Later, however, tensions began to develop between Peters and the National Party, which only worsened after Jenny Shipley staged a party room coup and became prime minister. After a dispute over the privatisation of Wellington International Airport, Peters was sacked from Cabinet again on 14 August 1998. He immediately broke off the coalition and led New Zealand First back into opposition. However, several MPs, including deputy leader Henare, opted to stay in government and leave New Zealand First. It later came out that Henare had tried to oust Peters as leader, but failed. Henare and other disaffected NZ First MPs formed the short-lived Mauri Pacific party. None of the MPs who opted to stay in government retained their seats in the next election.