The US State Department has notified Congress that it plans to close five foreign missions in a rare downsizing of America’s global diplomatic footprint, according to people familiar with the notice. In the notice sent to some congressional committees late last week, the State Department said it planned to close its posts in St George’s, Grenada; Nagoya, Japan; Medan, Indonesia; Douala, Cameroon; and Winnipeg, Canada. The people familiar with the notice spoke on condition of anonymity because...