Mark Carney calls byelections for Aug. 31 to fill three federal House of Commons seats in Ontario, Quebec and British Columbia. The races are for constituencies represented by MPs who have left federal politics for different reasons. In one case, the outgoing member leaves Parliament. In another, the former MP is appointed as an ambassador. A third seat becomes vacant after the member is named to the Senate. The announcements set the election date for all three contests, consolidating the process across the three provinces. While the reports identify the underlying causes for each vacancy—departure from politics, an ambassadorial appointment and a Senate appointment—they do not provide candidate names or campaign details. The byelections proceed under the standard federal process for vacant seats, with the specific constituencies in Ontario, Quebec and B.C. to be contested on the same day as announced by Carney.