We are closing our coveragepublished at 21:54 British Summer Time 23 July
We are closing our stream-only coverage of lawmakers questioning law enforcement over the assassination attempt on former President Donald Trump.
Thank you for joining us.
The Homeland Security Committee is holding a hearing on the attempted assassination of Donald Trump on 13 July
The chief of the Pennsylvania State Police and a head of a national policing union are being grilled over law enforcement failures that led to the shooting at the presidential rally
Videos from before the attack show how onlookers tried to alert law enforcement officers to the presence of the gunman on a roof
Secret Service director Kimberly Cheatle resigned on Tuesday, a day after she gave evidence at a different committee
This is a stream-only page, without regular text updates
This is a stream-only page, we will not be providing regular text updates
We are closing our stream-only coverage of lawmakers questioning law enforcement over the assassination attempt on former President Donald Trump.
Thank you for joining us.
As today's hearing gets started, we can bring you news that Secret Service director Kimberly Cheatle has announced that she plans to resign.
Cheatle testified for nearly six hours during a contentious House committee hearing on Monday where she took responsibility for the security lapses and acknowledged that the incident marked "the most significant operational failure of the Secret Service in decades".
But lawmakers ridiculed her answers and the lack of information the agency had made public, with politicians on both sides of the aisle calling for Cheatle's resignation.
As it stands, it is unclear when she intends to step down.
This is is a stream-only page. For more on this development, you can follow our coverage of the presidential race here.
Thomas Copeland
Live reporter
Ahead of today's hearing, House Speaker Mike Johnson and Minority Leader Hakeem Jeffries officially announced plans for a bipartisan task force to look into the attempted assassination of former President Donald Trump.
It will be made up of six Democrats and seven Republicans and have the legal powers to compel people and organisations to submit evidence or speak at a hearing.
鈥淭he task force will be empowered with subpoena authority and will move quickly to find the facts, ensure accountability, and make certain such failures never happen again," the two leaders said in a joint statement.
The lead sponsor of the resolution, which will be voted on later this week, is Republican Congressman Mike Kelly - who was in the front row during the shooting at Trump's rally last month.
Today鈥檚 hearing in Washington DC is being held by the House Committee on Homeland Security to look into the attempted assassination of former President Donald Trump.
Speaking at the hearing as witnesses are:
Both Department of Homeland Security (DHS) Secretary Alejandro Mayorkas and Secret Service boss Kimberly Cheatle declined an invitation to testify. Federal Bureau of Investigation (FBI) Director Christopher Wray was also invited but not available for the hearing.
You can watch the hearing from 15:00 BST (10:00 local time) in full by clicking the play button at the top of this page.
It is stream-only and we will not be providing regular text updates.
As a reminder, this hearing comes off the back of an attack on a Donald Trump rally in Butler, Pennsylvania on 13 July, which saw the former president's ear struck by a bullet and a supporter killed.
Thomas Matthew Crooks opened fire towards the president from the roof of a nearby warehouse, killing one person attending the rally and injuring two others.
Trump was also injured and taken away in a huddle by the Secret Service, while the 20-year-old gunman was killed by law enforcement at the scene.
Multiple witnesses recall spotting Crooks on the roof and alerting police officers on the ground minutes before he opened fire.
Since then, the Secret Service has been widely criticised over its conduct on the day. At yesterday's hearing, Secret Service Director Kimberly Cheatle said her agency "failed" to protect Trump.
Speaking at the Republican National Convention just five days later, Trump said he was "not supposed to be here" and was only alive to tell the story "by the grace of almighty God".
Thomas Copeland
Live reporter
We heard on Monday from Secret Service Director Kimberly Cheatle, who was put through a six-hour grilling by the House Oversight Committee over the security failures that led to the attempted assassination of Donald Trump.
Today鈥檚 hearing is in front of a different group of lawmakers, the House Committee on Homeland Security.
According to its chairman, Mark E Green, Cheatle has refused to appear in front his committee. They鈥檒l hear from local law enforcement leaders today.
In case you missed it, here鈥檚 what happened when she testified yesterday:
You can read our full coverage of Monday鈥檚 hearing here.