Marty Bass is live at FW Haxel, the Baltimore flag store that makes the banners that will go outside Oriole Park at Camden Yards.

In an open letter this week, all of the country's living former prime ministers asked Canadians to fly the Canadian flag this Saturday, National Flag Day.

“Isn’t it wonderful?” said Ms. Hartlen, who owns The Flag Shop Nova Scotia. “Thank you, Trump. Who would have thought we’d be saying that?” The renewed interest in Canada’s maple ...