OTTAWA—Conservative Leader Erin O’Toole will face a vote on his leadership with one former caucus supporter now saying more than one-third of them want him gone. The Canadian Press has confirmed that Ontario MP Scott Reid, chair of the party’s caucus, has informed MPs that he received written notice with signatures from at least 20 percent of members requesting a review of O’Toole’s leadership. The process MPs are following is outlined in the Reform Act, which gives a party’s caucus the ability to trigger a leadership review. After last year’s election loss, the Conservative caucus gave itself the power to vote on O’Toole’s leadership _ a measure the leader described as a welcome exercise in accountability. In his correspondence to MPs Monday, Reid says the notice he received was valid and more details would follow on when a leadership vote would happen. The Conservative caucus is next set to meet …