House Homeland Security Committee Chairman Mark Green, R-Tenn., is calling on Secret Service Director Kim Cheatle to resign.

"Cheatle argued the Secret Service could not position counter-snipers in the location of the shooter because of the angle of the roof. This was an absurd, unacceptable, and obviously unfounded excuse," he said in a statement. "Cheatle placed blame at the feet of local law enforcement for the failures of that day -- blatantly ignoring the fact that local officers indicated ahead of time they did not have the ability to secure the building that the shooter used to fire those fateful shots."

"Director Cheatle has rightfully admitted the near assassination of a former president was a failure. She even said the buck stops with her," Green continued. "For the good of this country, Director Cheatle must resign immediately."

Green will visit the shooting site in Butler, Pennsylvania, at 11:30 a.m. ET Monday with a bipartisan group of members on the House Homeland Security Committee.

House Republicans are expected to hold a vote later this week on creating a task force to investigate the attempted assassination of former President Donald Trump.

The resolution, entitled "Establishing the Task Force on the Attempted Assassination of Donald J. Trump," will be introduced by Pennsylvania Republican Rep. Mike Kelly – who represents Butler, Pennsylvania, where the Trump rally took place.

The task force will include six Republicans and five Democrats and issue its findings to the House no later than Dec. 13, 2024.

-ABC News' Lauren Peller

Over a week after the assassination attempt made on Donald Trump during his campaign event in Pennsylvania, the former president has confirmed he was not warned of the gunman's presence at the rally before shots rang out.

During an interview with "Fox News" Sunday, Trump said that "nobody" warned him not to take the stage, even after the U.S. Secret Service spotted the rally shooter.

"Nobody mentioned it; nobody said it was a problem," Trump said when asked if was warned.

"They could've said, 'Let’s wait for 15, 20 minutes, five minutes,'" Trump continued, adding he believes it was a "mistake."

Trump then questioned how the suspected shooter got on the roof and why he wasn’t reported despite people seeing him.

"How did somebody get on that roof? And why wasn't he reported?" Trump asked.

Trump’s running mate Sen. JD Vance, who joined the interview, echoed the sentiment, saying he believes "there are a lot of good field agents" but added someone higher up "really screwed up."

-ABC News' Soorin Kim

The U.S. Secret Service issued a statement to ABC News in response to questions about a Washington Post report that top U.S. Secret Service officials "repeatedly denied requests for additional resources and personnel sought by former President Donald Trump's security detail in the two years leading up to his attempted assassination at a rally in Pennsylvania on July 13."

Secret Service spokesperson Anthony Guglielmi issued a statement to ABC News, saying, "The Secret Service has a vast, dynamic and intricate mission. Every day we work in a dynamic threat environment to ensure our protectees are safe and secure across multiple events, travel and other challenging environments. We execute a comprehensive and layered strategy to balance personnel, technology and specialized operational needs."

Guglielmi added, "In some instances where specific Secret Service specialized units or resources were not provided, the agency made modifications to ensure the security of the protectee. This may include utilizing state or local partners to provide specialized functions or otherwise identifying alternatives to reduce public exposure of a protectee."

A source familiar with Secret Service processes told ABC News that the Washington Post story is generally accurate but makes clear that though requests for additional resources were not always fully granted, adjustments were made to accommodate the security needs.

In instances where Trump attended non-campaign events like football games, measures were taken to control his movement in areas that could more effectively be controlled, such as using tunnels and passageways, and Secret Service personnel were posted with hand-held magnetometers to screen people in close proximity to the former president, according to the source.

There were also instances when, if requested Secret Service counter-sniper teams were not available, sniper teams from local law enforcement agencies were used to augment security, the source said.

-ABC News' Jack Date and Pierre Thomas