Conservative Leader Erin O’Toole is facing an internal revolt and some members of his caucus are prepared to trigger a vote on his future as early as Wednesday, sources told CBC News.

MPs opposed to O’Toole’s leadership have collected enough signatures — 35 have signed on to the effort so far — to hold a secret ballot to decide his fate, sources said.

A vote by 50 per cent plus one of the 119 sitting Conservative MPs calling on O’Toole to step down would force him to make way for an interim leader immediately.

Sources tell CBC News that O’Toole’s caucus opponents believe they have the