Former Governor-General David Johnston appears before a Commons committee on Parliament Hill in Ottawa on Tuesday, Nov. 6, 2018.Sean Kilpatrick/The Canadian Press Former Governor-General David Johnston has been named as the government’s pick to oversee an investigation of the Chinese government’s interference in Canadian elections. Prime Minister Justin Trudeau announced Wednesday that Mr. Johnston will take on the role of special rapporteur to review the findings of two closed door panels that Ottawa set up to investigate Beijing’s interference activities in the 2019 and 2021 elections. “David Johnston brings integrity and a wealth of experience and skills, and I am...