In which strait did two cargo ships collide in an accident that postponed the election where Peter Francis Martin was elected by acclamation?
Peter Francis Martin:  Martin was elected by acclamation in the Khaki Election of 1917; in Halifax, the election was postponed after the Halifax Explosion and Martin's Liberal opponent withdrew in a show of post-explosion unity. Halifax Explosion:   , a French cargo ship laden with high explosives, collided with the Norwegian vessel  in the Narrows, a strait connecting the upper Halifax Harbour to Bedford Basin.
the Narrows