One spectator was killed and two were hurt in the shooting on July 13.
Federal authorities are investigating after former President Donald Trump was shot in the ear in an assassination attempt at an election rally in Butler, Pennsylvania, on July 13.
The alleged shooter was killed by snipers. One spectator was killed and two were hurt, officials said.
First lady Jill Biden spoke with former first lady Melania Trump by phone on Sunday afternoon, a White House official told ABC News.
The White House did not share any further details about the call.
-ABC News’ Lauren Peller and Molly Nagle
The gunman who fired on former President Donald Trump on Saturday should never have been able to get a "direct line" of sight, Homeland Security Secretary Alejandro Mayorkas said.
"A direct line of sight like that to the former president should not occur," Mayorkas told ABC News' on "Good Morning America" on Monday. "That's why president Biden directed an independent review of the incident."
"We have to learn everything about the assailant ... and we are going to really study the event independently and make recommendations to the Secret Service," he said.
Homeland Security chief speaks out after attempted assassination of Trump
The U.S. Secret Service has added additional security to former President Donald Trump's detail ahead of the Republican National Convention, the agency’s director, Kimberly Cheatle, said in a statement on Monday.
“In addition to the additional security enhancements we provided former President Trump's detail in June, we have also implemented changes to his security detail since Saturday to ensure his continued protection for the convention and the remainder of the campaign,” Cheatle said.
The former president will have additional tactical officers, including SWAT, added to his detail, along with other updates, a law enforcement source told ABC News.
-ABC News’ Pierre Thomas
U.S. Secret Service Director Kimberly Cheatle said her agency welcomes the independent review announced by President Joe Biden.
“We understand the importance of the independent review announced by President Biden yesterday and will participate fully,” Cheatle said in a statement issued on Monday. “We will also work with the appropriate Congressional committees on any oversight action.”
Questions have been raised about how the suspect in the assassination attempt was able to climb on top of a roof near former President Donald Trump’s rally on Saturday.
“The Secret Service is working with all involved Federal, state and local agencies to understand what happened, how it happened, and how we can prevent an incident like this from ever taking place again,” Cheatle said.
-ABC News’ Pierre Thomas and Kevin Shalvey
