OTTAWA—Conservative Leader Erin O’Toole is to learn Wednesday from the Tory caucus whether he will remain as party leader. Here are some key players who have been involved in calls for his leadership to be reviewed. Garnett Genuis—The Alberta MP is one of the signatories to a letter endorsed by around one-third of O’Toole’s 118-member caucus who want him removed as leader. Genuis, who O’Toole picked to serve as his critic for international development and human rights, initially urged Conservatives to rally behind the leader after last year’s election loss. Now, he says, that’s changed. Sen. Denise Batters—The longtime Conservative launched a petition last November for party members to sign if they wanted to see O’Toole’s leadership reviewed earlier than the scheduled date of 2023. Batters said O’Toole flip-flopped on party policies around gun control and the carbon tax, which made him untrustworthy to Canadians. O’Toole then removed her from …