But, on the same programme, Collins had a clear message to any of her MPs leaking information: Get out, now.
This comes after details of National's closed-door caucus vote, including the fact Mark Mitchell challenged Collins for the leadership, was almost immediately leaked.
And in the proceeding days, a number of National MPs anonymously spoke to Newshub about Collins' leadership.
"It was a bit rich getting a lecture in loyalty and unity when those two [Collins and Brownlee] leaked so much in the past," one was quoted as saying.
Another said, "A lot of dead rats had to be swallowed ..."
Asked if her message was for leaking MPs to get out of the caucus rather than continue doing so, Collins said: "I think that's pretty much the message.
"And I don't think anyone would disagree with that."
She said leaking caucus members "are not going to help their own chances".
Speaking to media this morning, after unveiling her new party billboards today, Collins said National would not form a government with NZ First after the election.
"I don't know that his party is going to be there after the election."