Christopher Luxon's grip on his leadership is again being questioned following a week of communication gaffes and a fresh report his MPs are unhappy.

The National Party has been gripped by another round of discontent and speculation.

Christopher Luxon's grip on his leadership is again being questioned following a week of communication gaffes and a fresh report his MPs are unhappy.

OPINION: The PM has called a caucus meeting to discuss his leadership on Wednesday.