In the immediate aftermath of the mass shooting that killed 17 people at Marjory Stoneman Douglas High School in Parkland, Fla., a year ago, 71 percent of Americans said laws covering the sale of firearms should be stricter. Now, it’s 51 percent.

In the immediate aftermath of the mass shooting that killed 17 people at Marjory Stoneman Douglas High School in Parkland, Fla., a year ago, 71 percent of Americans said laws covering the sale of firearms should be stricter. Now, it’s 51 percent.