Sarah Huckabee Sanders, the White House press secretary, at a children’s fitness event on Wednesday. At a separate press briefing she responded to a young student’s question about violence in schools.

Sarah Huckabee Sanders, the White House press secretary, audibly choked up during Wednesday’s press briefing as she answered a student’s question about school shootings.

The student, Benje Choucroun, 13, was at the White House covering a children’s fitness event for Time for Kids, but was called on as he sat among the White House press corps. He said his school recently had a lockdown drill.

Reading from a sheet of paper, he said that one thing that affected students’ mental health was “the worry about the fact that we or our friends could get shot at school.”

“Specifically,” the boy asked, “can you tell me what the administration has done and will do to prevent these senseless tragedies?”

Ms. Sanders, her voice breaking at times,…