Victor Escalon, Regional Director of the Texas Department of Public Safety South, speaks to the press during a news conference outside of Robb Elementary School in Uvalde, Texas, Thursday, May 26, 2022. Escalon says the 18-year-old gunman who slaughtered 21 people at the elementary school entered the building "unobstructed" through a door that was apparently unlocked. (AP Photo/Dario Lopez-Mills)

Men form a prayer circle at a memorial site for the victims of the Robb Elementary School shooting, Thursday, May 26, 2022, in Uvalde, Texas. (Kin Man Hui/The San Antonio Express-News via AP)

A women, who declined to give her name, writes a message at a memorial site for Jose Flores, one of the Robb Elementary School shooting victims, in Uvalde, Texas, Thursday, May 26, 2022. (AP Photo/Jae C. Hong)

White House press secretary Karine Jean-Pierre speaks during the daily briefing at the White House in Washington, Thursday, May 26, 2022. (AP Photo/Susan Walsh)

FILE - President Joe Biden holds pieces of a 9mm pistol as he speaks in the Rose Garden of the White House in Washington, April 11, 2022. Biden announced a final version of the administration's ghost gun rule, which comes with the White House and the Justice Department under growing pressure to crack down on gun deaths. (AP Photo/Carolyn Kaster, File)