Yves Engler speaks to supporters at the Montreal Courthouse on Nov. 28.

The NDP has rejected Yves Engler, an author and left-wing activist, from standing for the leadership for the party alleging he had harassed, intimidated and confronted elected officials. It also expressed concern he had echoed Russian state propaganda about the invasion of Ukraine .

Mr. Engler was told at the end of last month that his application to join the leadership race had been rejected after consideration by the party’s vetting committee. He asked for a formal review of the decision.

But the NDP did not change its ruling, communications between the party and Mr. Engler show.

The committee cited a number of concerns about the socialist activist’s potential candidacy. In a confidential e-mail to Mr. Engl

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