I think it’s important to make a distinction between union members and blue collar union members. I’m sure teachers and public servants are more likely to lean further left but all the rhetoric I’ve heard on construction sites since I got into a trade has been super conservative.

The union even endorsed Doug Ford in the latest provincial election.

https://nationalpost.com/news/canada/first-time-in-ontario-history-ontario-pc-party-adds-labour-union-to-list-of-endorsements

For the record I have polar opposite political views to the other workers and it’s a very lonely world