In a Newshub Reid-Research poll the National leader's popularity fell to 5 percent, while National MP Judith Collins rose to 6.2 percent in the preferred prime minister rankings.
Prime Minister Jacinda Ardern sits comfortably on 41.8 percent in the same rankings.
It is also the first time in the poll's history that Labour has pushed ahead of National in the party rankings, picking up 4.9 percentage points to 47.5 percent. National dropped 3.5 to 41.6 percent.
National MPs arriving at Parliament this morning backed Mr Bridges as leader despite the low polling.
"I think we've got a wonderful leader," said senior MP Louise Upston. "Polls are nothing. Simon Bridges is doing an awesome job and we're focusing on what matters to New Zealanders."In response to a question as to whether the leadership of the party might be discussed at the party's caucus meeting this morning, senior MP Gerry Brownlee said "I don't think it's up for consideration at the moment."
Deputy leader Paula Bennett backed Mr Bridges as leader of the party and was pleased to see Judith Collins was a popular MP.
"I think Judith is fantastic," she said. "She's a great member of the team and I think it's great people love her."
Senior MP Mark Mitchell agreed, while also ruling himself out from any potential leadership contest.
"It's good that we've got members of caucus that are popular and are seen to be doing a good job," Mr Mitchell said.
"I've stated very clearly that I'm not running for leader again. Simon was elected by the caucus as our leader, I'm 110 percent behind him."
The MP for Northland, Matt King, was the only one throwing a spanner in the works, backing both Mr Bridges and Ms Collins for the leadership.
"I like Simon, I like Judith. I like a few of our leaders," he said.
"Look there's a number of people in our caucus that can lead our party and I'd be happy with any one of them.
"If Judith went for the job and had the support of the caucus I'd support Judith as well."