In an unprecedented move, a union representing hundreds of Ontario journalists and media workers is urging its members not to vote for Tim Hudak's Progressive Conservatives on Thursday.

Unifor Local 87-M, historically known as the Southern Ontario Newsmedia Guild, released a video Monday warning a PC government would pose a threat to the livelihood and workplace security of its 2,600 members.

In the clip, Toronto Sun union chair and veteran journalist Jim Slotek explains that while its members work in a field committed to objectivity, there is a "point where objectivity and reality collide."

While he doesn't endorse the Ontario Liberals or NDP, Slotek urges members to consider the "practical reasons" for not supporting the Ontario Progressive Conservative Party, "an oxymoron under its current leader Tim Hudak."

Slotek is critical of the PC leader's plan to cut 100,000 public sector jobs — "most of them unionized" — in four years and says Hudak has a clear "hatred" of organized labour. He also references the right-to-work policy that Hudak abandoned before the election as proof the PC leader aims to weaken labour laws in the province.

At one point, Slotek highlights a part of a PC caucus white paper released in 2012 — Paths to Prosperity: Flexible Labour Markets — saying the Ontario Labour Relations Board and Workplace Safety and Insurance Board are "overdue" for reform.

"Yes, we must be flexible about workplace safety to stay competitive," Stolek says sarcastically. "Count your fingers now while you still have them."

Slotek ends the video urging members to vote for the party of their choice, but to also consider which one is least likely to "act in your interests as a wage earner."

In a press release, Unifor Local 87-M president Paul Morse said it was a big deal for the union to break its traditional silence during elections.

"As a media local representing a large number of journalists, we have strict policies against endorsing candidates or contributing financially to election campaigns," Morse said in the release.

"But the threat of Hudak and his circle of Tea Party groupies is too great for us to remain silent. We're not telling our members who to vote for. We're asking them to vote for someone other than Hudak and his party."

The union represents employees at some of the biggest news outlets in the province, including The Globe and Mail, Toronto Star, Toronto Sun, Ottawa Citizen and Maclean's Magazine.

Several journalists took to Twitter Monday to share their thoughts on the union's announcement.