WASHINGTON—President Donald Trump on May 8 welcomed to the White House mothers who lost children to violence by illegal immigrants or in service to the U.S. Armed Forces, as part of Mother’s Day celebrations. The president hosted a luncheon in the newly renovated White House Rose Garden, where he addressed Angel Mothers, Gold Star Mothers, and other guests. Trump described the mothers at the event as “strong and truly heroic moms who have stood up for their children.” He also reflected on his own mother, Mary Anne MacLeod, saying, “I always think so fondly of my mother. Had a wonderful mother.”...