A YouGov poll commissioned by The Australian on Wednesday suggested Mr. Zimmerman held a two-party preferred lead of 53-47 against Labor.
But Dr Renshaw said lifelong Liberal voters had told her they were switching to Labor in the seat because they wanted to “get rid of Scott Morrison and Barnaby Joyce”.
She said Ms Tink’s supporters were giving Labor their second preference.
“We think we’ve got a real fighting chance in the seat of North Sydney,” she said.
“I have been doing pre-poll for the past two days with people who have been handing out [how to vote cards] for Labor for three or four elections. They say they’ve never seen anything like it.
“We’re incredibly heartened by what we’re seeing on the ground, at pre-poll and in some of the polls we’ve seen recently as well.”
Opposition Leader Anthony Albanese has visited the seat twice during the election campaign, including for an event with early childhood education advocate and The Parenthood founder Georgie Dent on Wednesday.
Labor believes more skilled and experienced workers will be able to enter the workforce and families will have more money through its plan for cheaper childcare.
Extra work for mums
Grattan Institute modeling showed the policy would increase the hours worked by secondary earners with young children by 8 percent. That change could see 220,000 extra days of work a week for second income earners, predominantly mums.
Ms. Dent said out-of-pocket costs for early childhood education and care had risen by 15 per cent since the 2019 election.
“We know that the cost of early childhood education and care is crippling for families,” she said.
“Aside from housing, it is usually the biggest source of financial pain. Making early childhood education and care radically more affordable and accessible is the smartest economic and social reform we can pursue.”
Labor’s national campaign and Jason Clare said it was not able Mr. Albanese was campaigning in the seat while Mr. Morrison remained absent.
“Why can’t Scott Morrison go to North Sydney? Because he’s political kryptonite. If he goes there, you can imagine the sitting Liberal member keel over and go into the fetal position.
“We know we’re up against it. North Sydney is a very, very hard seat for Labor to win at any time.”
But Mr. Clare cited Labor’s 2019 election loss and counseled Australians not to listen to opinion poll results.
“What matters is seats, not polls. We need to win seats, not polls,” he said.