A year ago, then-NDP leader Jagmeet Singh's Labour Day message to workers insisted that his party alone would stand shoulder-to-shoulder with working Canadians and the unions that work to protect their rights.

Six months later, Singh stood outside of an auto plant in Windsor, Ont., during the federal election, hoping to offer support and comfort to workers reeling from news of new auto tariffs from U.S. President Donald Trump.

But Singh was not greeted with warmth — most of them ignored him entirely, rushing past with their heads down as they came off shift, while some others indicated a preference for the Conservatives and Leader Pierre Poilievre.

It was an early indication that the NDP's stranglehold on union voters was loosening.

And sure enough, when the votes were counted on elect

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