Trump Jr. says father is 'changed man'

Former classmates of the suspected shooter, 20-year-old Thomas Matthew Crooks, of Bethel Park, Pennsylvania, described him to ABC News as a student who was "quiet" and did not have many friends.

"He was somebody who came across as lonely a lot," said Jameson Myers, who said he attended both elementary and high school with Crooks.

Myers described him as "more socially reserved" and someone who "didn't have a ton of friends."

MORE | What we know about the Trump rally shooting suspect

But he said he never heard Crooks discuss politics or, specifically, Donald Trump.

"I was friends with him. He never acted, like, by any means, a political revolutionary," Myers said. "Was a very nice, even sweet guy, from what I knew."

Another classmate, Zoe Materkowski, said he was "just a quiet kid."

Added Jason Kohler, a classmate: "He was a loner. He would sit alone at lunch."

Classmate Robert Abraham described him as "smart" and "kind."

Pennsylvania Gov. Josh Shapiro has identified the man killed yesterday in the shooting at the Trump rally as Corey Comperatore and said he had just spoken with Comperatore's wife and two daughters.

"Corey was a girl dad, Corey was a firefighter, Corey went to church every Sunday," Gov Shapiro said. "Most especially Corey loved his family."

Shapiro said Comperatore died a hero.

"Corey dove on his family to protect them last night at this rally. Corey was the very best of us."

MORE | Governor says man killed at Trump rally was former fire chief who 'died a hero'

Pennsylvania Gov. Josh Shapiro says the man who was killed at a rally for former President Donald Trump "died a hero" and that Corey Comperatore dove onto his family to protect them.

President Joe Biden and Vice President Kamala Harris are receiving an updated briefing on the Trump rally shooting in the White House Situation Room, according to the White House.

Officials giving updates to the president include: FBI Director Christopher Wray, Attorney General Merrick Garland, Secret Service Director Kim Cheatle and Homeland Security Secretary Alejandro Mayorkas.

Biden will deliver remarks at 1:30 p.m.

Rep. Mike Lawler, R-N.Y., and Rep. Ritchie Torres, D-N.Y., plan to introduce a bipartisan bill that would provide "enhanced Secret Service protection" for President Joe Biden, former President Donald Trump and presidential candidate Robert F. Kennedy Jr.

"Last night's attempted assassination of former President Trump was a dark moment in our nation's history. As reports continue to emerge, it's clear that more protection is needed for all major candidates for president," Torres and Lawler said in a joint statement.