Open this photo in gallery: House of Commons Speaker Greg Fergus appears as a witness at a standing committee of Procedures and House Affairs on Parliament Hill in Ottawa on Dec. 11.Sean Kilpatrick/The Canadian Press Greg Fergus, who became Speaker of the House of Commons in October, says he is prepared to resign from his post if MPs decide that he should. Mr. Fergus is under fire for participating in a congratulatory video for John Fraser, the former interim leader of the Ontario Liberals, and a long-time personal friend. In the video screened at the party meeting where Bonnie Crombie...