Canada’s parliament on Tuesday elected Greg Fergus as its first black speaker, following his predecessor’s resignation over the public celebration of a Ukrainian veteran who fought for the Nazis. Fergus, a Liberal MP, said the Commons is where “hard debates will happen,” but urged lawmakers to “treat each other with respect.” “There can be no dialogue unless there is a mutual understanding of respect.” As speaker of the chamber, his role is to chair House of Commons debates and enforce parliamentary rules while remaining impartial, only voting to break ties. Fergus was escorted arm in arm into the House of...