Justin Trudeau’s Liberal party. On September 16th the prime minister’s party lost a by-election in his hometown of Montreal, an area that it had represented almost uninterruptedly since the second world war.

How Canada’s clinical trial industry exploits test subjects, a drama-filled return to the Hill and a crowded byelection ballot in Don Valley.

The Liberal Party suffered its second major defeat in less than three months, a result that will likely pile pressure on Trudeau to step down.