1. A dramatic moment at the White House: A father who lost his daughter in the Parkland, Fla., massacre made an impassioned plea to President Trump to ensure school safety.

“How many schools, how many children have to get shot?” asked Andrew Pollack, above.

The president is facing mounting pressure to take action against gun violence. Mr. Trump said his administration would be “very strong on background checks” of those wishing to purchase guns, and put “a very strong emphasis on the mental health of somebody.”