OTTAWA — Bickering over politics and procedure is getting in the way of efforts to have a House of Commons committee investigate how a man who fought with a Nazi unit was lauded as a hero in Canada's Parliament. While all parties appear to agree a committee study is required, they differ on whom to blame: Liberal MP Anthony Rota, who resigned as Speaker after days of uproar over his choice to invite and recognize the man, or Prime Minister Justin Trudeau himself. The answer would determine which committee would pick up the probe into the events leading up to...