OTTAWA—Conservative Leader Erin O’Toole will face his caucus today for the first time since his party’s disappointing election defeat two weeks ago. The 119 Conservative MPs are set to gather in person in Ottawa where, among other things, they’ll have to decide whether they want the power to review O’Toole’s leadership. Under legislation passed in 2015, each party’s caucus is required to decide after an election whether it wants to empower its members to trigger a leadership review, which requires a written notice backed by at least 20 percent of caucus. The rule also allows MPs to elect their own caucus chair and make decisions about whether someone should be expelled from the fold. A spokeswoman for O’Toole says the leader has always supported these legislative provisions and believes members should vote as they see fit. Conservatives finished the Sept. 20 election with two fewer seats than they won in …