The Prime Minister admits it hasn't been a great couple of weeks - but he fully believes he can win the election.

And Chris Hipkins told Mike Hosking the last 48 hours with Kiri Allan's car crash and the fall-out from it have been very difficult.

Hipkins won't say whether the Quay Street gunman should have been behind bars.

Two people died and four people remain in hospital in stable conditions, after the gunman opened fire at a construction site in downtown Auckland on Thursday morning.

The offender was working at the site, while on electronically monitored bail for domestic violence.

He says there's still a lot of investigations underway, and he won't be making public comment while those are still ongoing.

LISTEN ABOVE

• John MacDonald: Kiri Allan is a victim of Labour's shallow talent pool
• Barry Soper: Kiri Allan absolutely cannot come back from this