Union officials stressed they were not telling people how to vote but gauging candidates' views.

Union members rallied on Wednesday outside Port Macquarie MP Leslie Williams' office.

They raised concerns about what HSU organiser Michael Kearns said was a state-wide issue.

"The rally was to demonstrate to the local member that the workers within the public health network are opposed to privatisation in any form of public health services," he said.

NSW Nurses and Midwives' Association Port Macquarie Base Hospital Branch president Ken Procter said Queensland had taught them the fight was still on.

"Privatisation was a massive issue in Queensland that swung that election," he said.

Port Macquarie MP Leslie Williams said she did not have to sign the union pledge for the community to understand her position when it came to health.

"My focus is very much about making sure we deliver the right health policies at the end of the day that will benefit my community," she said.

"My priority in the health sector is mental health."

Mrs Williams said people could see through the union's political campaign.

Country Labor candidate for Port Macquarie Kristy Quill signed the pledge.

"I fully support the HSU in their protest against privatisation of health services within the hospital system and the health system in general," she said.

"I am very concerned about how the different areas are being privatised bit by bit."

The Greens' candidate Drusi Megget confirmed she would sign the HSU pledge.

"I think there is good reason to leave lots of things in public hands," she said.

"I think it is good for things like poles and wires to be in public hands, because it is an essential service, and I think that is probably true for the health services as well."

lisa.tisdell@fairfaxmedia.com.au