Former National Party leader Todd Muller is "still not quite right", according to Judith Collins.
He believes National has a good chance of winning the election.
Todd Muller stepped down as National Party leader citing "health" reasons.
Collins has repeatedly attacked recent poll results.
She says National's Palmerston North candidate is being bullied and she won't stand for that.
"It's what happens in life, isn't it."
She wants to know if any of her MPs are involved in a police investigation.
"When my eyebrow goes up, it's a joke."
"It reflects on him and he's accounted for that.''